Whether you think you can or you cannot, you're right!

I was born and grew up in a province where not many people can speak English.
I was so shy and reserved. I always dreamt of speaking English fluently so I could make friends with many, many people but I didn't know how to communicate with foreigners. I was not confident enough. I was about to cry and hated myself so many times.
One day, I read in my sister's book this sentence: " If you think you can, you can. And if you think you can't, you're right.". It's the saying of Mary Kay Ash that makes me change. I decided that If I couldn't win over my phobias, I couldn't success succeed in anything. I plan to study hard, encourage myself to be more confident and communicate with other people more positively. Now I feel much better and would like to make more friends overseas.
I know my English is still not good. I hope that through Italki I can make more friends, improve my English and learn from others. Thanks for reading!
Have a nice day!! <3

hightlighted is really the main thing I saw. 

Whether you think you can or you cannot, you're right!

I was born and grew up in a province where not many people could (can) speak English.
I was so shy and reserved. I always dreamt of speaking English fluently so I could make friends with many, many people but I didn't know how to communicate with foreigners. I was lacking in confidence / not confident enough. I was about to cry and hated myself so many times.
One day, I read in my sister's book this sentence: " If you think you can, you can. And if you think you can't, you're right.". It's this (the) saying of Mary Kay Ash that motivated me into action. (makes me change.) I decided that If I couldn't win over my phobias, then I couldn't succeed at (success in) anything. My plan was (I plan) to study hard, encourage myself to be more confident and communicate with other people more positively. Now, I feel much better and would like to make more friends overseas.
I know my English is still not good. I hope that through Italki I can make more friends, improve my English and learn from others. Thanks for reading!
Have a nice day!! <3

Very good!