In yesterday's dinner , my family mentioned about lessons that I took in my childhood. In yesterday's dinner, my family mentioned about lessons that I took in my childhood.

No need for a space before a comma

When I lived in Japan , I used to take lessons. When I lived in Japan, I used to take lessons.

I was learning the Ppiano for six years but I quit when I moved to another part of Japan. I was learning the piano for six years but I quit when I moved to another part of Japan.

No need to capitalise "piano"

I was also taking swimming and gymnastics lesson inat the same lesson place. I was also taking swimming and gymnastics lesson at the same lesson place.

AT the same place Gymnastics always has a S on the end when it is a noun

Also , I was goIing to the lesson ofa class about abacus and mental calcuklation for three years. Also, I was going to a class about abacus and mental calculation for three years.

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I loved thisese lessons for the most part. I loved these lessons for the most part.

I sometimes had exams, so to get higher grade so,s I practiced for that dbefore I took the exams. I sometimes had exams, so to get higher grades I practiced before I took the exams.

Or: to get A higher grade

I also used to go to the lesson ofa class about Japanese calligraphy and English lesson for half a year. I also used to go to a class about Japanese calligraphy and English lesson for half a year.

I reviewed what I did , and noticed I took many lessons. I reviewed what I did, and noticed I took many lessons.

No need for a space before a comma

And I remember , I was so tired in my childhood. And I remember I was so tired in my childhood.

Now , I don't take any lessons and I'm not that much tired as tired as I used to be, but I am facing to another problem that: I have to be able to speak English fluently to pass the exam for Japanese secondary school next year. Now, I don't take any lessons and I'm not as tired as I used to be, but I am facing another problem: I have to be able to speak English fluently to pass the exam for Japanese secondary school next year.

So, actually , I'm exhausted. So, actually, I'm exhausted.

No need for a space before a comma

However , I want to speak English, so, I can study English even if I am tired. However, I want to speak English, so I can study English even if I am tired.

I want to keep on studying English! I want to keep on studying English!