My First Day for Teaching in English

My First Day for of Teaching in English

or "My First Day Teaching in English"

One of the reasons I came to Alabama was to teach people my style of painting on porcelain.

"One of my reasons" is used more often than "One of my purposes"

I received 7 students and taught them in English.

This sentence is correct and makes sense, but "received" isn't used that often like this. Maybe "welcomed 7 students to the classroom"

It was my first time to teaching something in English as well.

"to teach" is also grammatically OK, but "teaching" sounds more natural.

I'm used to how to painting with my style, and I never thought it was really difficult for Western people.

If this is your first time teaching Western people, use "and I never would've thought it would be difficult for Western people."

If it is not your first time, then your version is correct.

I found that many people were struggling with it.

This sentence is fine. You could add, "To my surprise, ..." or "I was surprised to find that..." if you want.

I have used use very small and tiny brushes and love adding a lot of details on my paintings.

"small" and "tiny" mean the same thing. Remove one.

Some people told me that it's heritage and American people are not good at it.

I'm not 100% sure what they mean. There is "heritable" or "genetic," but this is biological. If they are talking about not doing this as children or not painting like this often, then that is cultural.

I was nervous if I made them difficult frustrated.

I told them before I got the techniques, I practiced a lot.

You could also say "got the techniques down" "got the skills down"

I've always believed that practice makes perfect.

"I've" seems like it was something you did in the past, but aren't doing now. "I've always" means you did and still do.

I'm so happy all my students arewere so patient and tried to improve their painting skills.

They seemed to enjoying painting with me.

My class continues to next day. tomorrow

"to next day" means that it ends tomorrow.

I hope tomorrow will go to be a easier day for them.

You can say either "go easier for them" or "be easier for them"

I learned that I have to think which way is the easiest way for my students to paint with my techniques.

You could remove "I learned that"

Although many of my American painting teachers have suggested to me that I should start teaching, I finally understand what they mean.

I took on 7 students and taught them in English.

Some people told me that it's cultural and American people are not good at it.

I've chosen 'cultural' here, but I wasn't sure you didn't mean 'genetic'.

I was worried that I had made the lessons too difficult.

I told them that before I mastered the techniques, I practiced a lot.

I've believed that practice makes perfect.

My class will continue tomorrow.

I hope tomorrow will be easier for them.

I learned that I have to think about which way is the easiest way for my students to paint with my techniques.