I listened a to an English video and repeated it again and again.

I was so delighted to be able to understand, so it and I did not need to use a dictionary.

I can read short stories. depending on my level of English.

depending my English level.

I combined this sentence with the previous one as it sounds better.

I also keep a bunch of words from a bottom of my heartin my mind and used them in the sentences regularly.

I sent to a friend of mine an email.

I told to him what I did today and I wrote to herim in Spanish because he speaks both languages English and Spanish.

He and I are close each eather.

Before going to bed, I also have to revise a bunch of words; it's a great deal forlot to do today!

I have a confession to make: h. Here is a bunch of words what I learnt today: effective ways, depending, close, each other, both and a bunch of.

Finally, I want to thank everyone for helping and correctiong me.y English. I am grateful for this site and to everyone who helps me.

I listened a to an English video and repeated it again and again.

an English video is a noun-phrase, a->an bc English starts with a vowel sound.
repeat->repeated (because you did it in the past)

I was so delighted to understand, so because I did not need to use a dictionary.

Other possibilities (they don't emphasize causation as much)
"I was so delighted to understand. I did not need to use a dictionary."
"I was so delighted to understand; I did not need to use a dictionary."

depending my English level.The previous sentence makes sense by itself, but this is not a complete sentence.¶
It can be combined with the previous sentence like this "I can read short stories depending my English level." but even that is a little difficult to understand. You might want to say something like "I can read short stories depending on their English level." This means you can read some easier English stories, but cannot read more difficult English stories.

I also keep a bunch of words from a bottomin the back of my heartmind and used them in the sentences regularly.

In English "from the bottom of my heart" means sincerely or "with genuine emotion". It almost always relates to emotions.
"Back of my mind" means subconscious or unconscious. It usually refers to memories that are easily accessed, but not memories that someone is consciously thinking. Both are idioms and don't really mean what they say literally.

I sent to an email to a friend of mine an email.

I told to him what I did today and I wrote to her in Spanish because he speaks both languages English and Spanish.

This also works, "I told to him what I did today and I wrote to her in Spanish because he speaks both languages: English and Spanish." but it places slightly more emphasis on the two languages and less emphasis on the writing.

He and I are close to each eaother.

"close to" means "near"

Before going to bed, I have to revise a bunch of words; it's a great deal forthere were quite a lot today!

I'm a little confused by "a great deal." I initially read "deal" as "sale" like something that is "on sale" (like at a store or market). I think you mean "a lot" as there are many words to revise.

I have a confession to make: ; There isare a bunch of words what I learnt today: effective ways, depending, close, each other, both and a bunch of.

confess = verb
confession = noun

Usually a confession has greater stakes like a deep secret or crime. My suggestion is to use "I have another thing to share;" or "You might not know this, but there are..." or "Want to know something else? There are..."

Finally, I want to thank everyone for helping and correctiong me. I am grateful for this site and everyone who helps me.