She also plays the piano and knows a lot about music.
When she was a students she must have studied and practiced hard.
She told me that she likes practicing the piano.
Actually, I don’t like practicing the piano.so much, but to make my dream come true, I practice it every day.
I sometimes try to master a difficult piano piece. When I play it perfectly I am so excited.
When I have a piano recital, I can show the results of my hard work because I tend not to get nervous.
If I have a chance, I want to accompany my classmates on the piano.
I like pop music better than classical music.I’m going to practice to improve my piano playing and I want to arrange a classical music into a pop music.
sembra naturale?

Here, I changed it up for you.

She also plays the piano, and knows a lot about music. When she was a student she must have studied and practiced hard.She told me that she likes to practice playing the piano. But, I don't like practicing the piano that much, but I will practice to make my dream come true. Sometimes I try to master a difficult piano piece. When I play it perfectly I'm so excited. When I have. piano recital, I can show the results of my hard work because usually I don't get nervous. If I ever get the chance I want to help my classmates with the piano. Also, I like pop music better than classical music. I'm going to improve my piano playing.

I think this sounds a little better, but you did very good!