My Wish

When I was a girl in a primary school, I always wished that I could be a teacher just like my teacher then. The teacher was my idol at that time because she was so kind and so patient when she was teaching us. I wanted to be a teacher that was as amiable as her.
When I grew older as a junior high school student, I wished to be a pianist because I enjoyed playing the piano very much, but my parents said, "If you have your own family in the future, being a pianist couldn't afford all the maintenance of the family." After talking with my parents, I decided to think of playing the piano as a hobby instead of an occupation.
Nowadays, I have a wish of being a doctor, because I want to help the people who are ill. I know this is very difficult to make this dream come true, but I am willing to try my best and try to increase my ability.

Almost perfect. Your spelling, punctuation and grammar are excellent! Good luck with your dreams!