It' was a summer day that started out with cloudy weather.

What is the tense of your story? You should keep the same tense throughout.

I decided to put on a light blackgrey jacket to keep myself warm and headed for my driving lesson.

No one ever says "light black". We only say "grey". (gray)

BI did this because recently I got caught by a heavy rain.

Grammar rules say you can't talk a sentence with "because".

I would even say a stormy rain.

Luckily, only my clothes was fullyere drenched, and I emerged out of it fully in tact.

Drenched already means "fully". One cannot get more wet than "drenched"
Similarly, intact means "whole"; can something become more "whole"?

By the time I reached the place where my driving lessons started, the clouds dissipated and the sun started shining heavily andbrightly. We we are back to a scorching hot day.!

Sun shines brightly. The essence of sunlight is air so we would not describe it as heavy.
Use ! to extress the extreme change in weather.

I'm am yet to master my driving.

Having a yelling instructor who yells doesn't help much.

When I finally returned home, I drank some coffee with some dark chocolate, drintaking some supplements alongt the waysame time.

Did you drink coffee mixed with dark chocolate? Did you have a mocha?
Unless the supplements are liquid, we "take" pills.

I listened to a Harry Potter audiobook and then I sat down behindat my laptop.

I remember the exact day, --it broke on Decemeber 29th.

Well, that phone had a history of meeting with an asphalt surface and surviving with only a little scratch.

there is an idiom "surving with only a scratch". It means little so we don't add the word little.

I'm a tall person, the phone fell about 5-6 years ago when a friend of mine decided to givscare me a fright andby jumpeding at me from behind.

"give me a fight" sounds very Victorian, like a older English lady with grey hair who grabs at her pearls and fans herself because someone "gave her a fright". Are you 80 years old? And from the UK? If not, no one "gives you a fright". :). :D.

I happened to be speaking on the phone.

I dropped it out of fright.

This is completely okay.

To my surprise, the phone continued working propererfectly!

The charge only lasted for a day.

In December we had some harsh winter days and in those days the battery died before about mid afternoon.

On December 29th Iit discharged before noon and I recharged but then Iit died again and never went back to lifewould never turn on again.

Other than being "discharged from the military", discharge generally used to refer to fluids leaving the body...

I then took it to a repair shop where I learned that it' was impossible to fix due to some problem with a motherboard.

tense

At one place I was given a price of 150 rubles., which is very little.

More idiomatic would be "which is nothing"

Which is very little. (see comment)

Incomplete sentence.

They gave asaid double the price of --300 rubles.

He thought that the problem was with athe display.

We then ordered a brand-new display from China and it took 2 months to delarriver.

However, after him trying to repair the phone, he came to the same conclusion - --the motherboard iwas dead and couldn't be revived.

So now the phone is sitting aton my desk and I'm thinking of going to athe shop and selling for 150 rubles.

But should I better throwIt's better than throwing it in the garbage?, right?

Or: Would it be better that I throw it into the garbage?
"But should I better throw it in the garbage" feels like the direct translation of an idiom in your language that does not translate to English. It has the structure of like Yiddish phrases, but doesn't translate to English.

It' was a summer day that started out with cloudy weather.

Because recently I got caught by ain heavy rain.

I would even say a stormy rain.

Luckily, only my clothes was fullyere drenched, and I emerged out of it fully in tact.

Saying "emerged out of it" is redundant as they both mean the same thing. You can just say "emerged".

By the time I reached the place wherelocation for my driving lessons start, the clouds dissipated and the sun started shining heavily and we awere back to a scorching hot day.

I'mve yet to master my driving.

Having a yellingn instructor who yells doesn't help much.

I listened to a Harry Potter audiobook and then I sat down behindwith my laptop.

I happened to be speaking on the phone.

The charge only lasted for a day.

On December 29th I dischargedunplugged it before noon and I recharged but then Iit died again and never went back to life.

I then took it to a repair shop where I learned that it's impossible to fix due to some problem with athe motherboard.

He thought that the problem was with athe display.

So now the phone is sitting at my desk and I'm thinking of going to aback to the shop and selling for 150 rubles.

But shwould Iit be better to throw it in the garbage?

It' was a summer day that started out with cloudy weather.

I decided to put on a light black jacket to keep myself warm and headed out for my driving lesson.

I also took an umbrella, just in case it started raining because recently I got caught in heavy rain.

Because recently I got caught by a heavy rain.-

I would even say that it was a stormy rain.

Luckily, only my clothes wasere fully drenched, and I emerged out of it fully in tact.

By the time I reached the place where my driving lessons starttook place, the clouds dissipated and the sun started shining heavily and. We we are back to a scorching hot day.

I'mve yet to master my driving.

I remember the exact day, it brokehappened on Decemeber 29th.

I was only half -surprised.

I happened to be speaking on the phone.

But last year, the battery on the phone became weaker and weakstarted draining faster.

In December, we had some harsh winter days and ion those days, the battery died before about mid afternoon.

On December 29th, I discharunpluged it before noon and I rechargedthen I plugged it back again, but then Iit died again and never went back to lifeturned back on.

I then took it to a repair shop where I learned that it' was impossible to be fixed due to some problem with athe motherboard.

So, I thought I would sell it for parts.

At one place I was given a price ofoffered 150 rubles.

After a couple of months I happened to stumble upon another repair shop, so I asked how much they would give me for the broken phone.

They gave a double price of 300 rublesoffered me 300 rubles: double the amount from the previous offer.

I brought the phone and tThe guy, lookinged at the phone, and suggested that he would try to repair the phone and. I agreed.

He thought that the problem was with athe display.

We then ordered a brand-new display from China and it took 2 months to delarriver.

However, after hime tryingied to repair the phone, he came to the same conclusion - the motherboard is deadbroken and couldn't be revivstored.

So now the phone is sitting aton my desk and I'm thinking of going to a shop and selling it for 150 rubles.

But sShould I betterinstead throw it in the garbage?