It's mMy first time to comewriting here

"My first time here" or "My first time coming here" are also ok.

I had a job interview today and got back to my place earlier than normal ¶
usual. I took only a few minutes to rest, then went to couple of bicycle shops to fix my own onehave my bicycle looked at and fixed.

reMost of themshops I went to said that they couldn't help me because they don't have spokes fits tothat fit my bicycle ¶
bu. The owner at the last shop ownerI went to found another way to solve thise problem which is: just changinge the whole wheel ¶
. I was pretty tired of visiting so many shops in a row andso I was like o, "Okay, please, change the wheel ¶
t."¶
¶
This is the story about how I spent money today t. Thank you.

Who's the "rest of them" in this sentence? I assume you meant most shops you went to already and structured the sentence according to that assumption.

It's my first time to come here

Alternatively: "It's my first time coming here".

I had a job interview today and got back to my place earlier than normal ¶
.¶
I took only a few minutes' rest, then went to a couple of bicycle shops to (try to) fix my own onbicycle.

(1) Note the apostrophe (') after "minutes".
(2) The addition of "then" establishes that it's a sequence of events.
(3) In the phrase "went to a couple of bicycle shops to fix my own one", "my own one" means "my own bicycle shop". However, I assume that you don't have a bicycle shop, and are instead referring to your bicycle.

The rest of them said they couldn't help me because they doidn't have spokes fits tothat fit my bicycle ¶
b.¶
But the last shop owner found another way to solve this problem which iwas just changing the whole wheel .¶
I was pretty tired of visiting shops in a row and was like o"Okay, please change the wheel ¶
t."¶
This is the story about how I spent money today t. Thank you.

(1) It's "didn't" and not "don't", since you're writing in the past tense.
(2) It's "fit" and not 'fits", since "spokes" is plural.
(3) It's "was" and not "is", since you're writing in the past tense.

It's my first time to comeing here

I had a job interview today and got back to my place earlier than normal ¶
usual and took only a few minutes of rest, went to a couple of bicycle shops to fix my own onbicycle.

The rest of them said they couldn't help me cause they don't have spokes that can fits to my bicycle, ¶
but the last shop owner found another way to solve this problem, which iwas just changing the whole wheel ¶
. I was pretty tired of visiting shops in a row and like okay, please change the wheel ¶
t. This is the story about how I spent money today, thank you.