What my problem in using English daily conversation and how do i overcome it

My problem in using English daily conversation is i am poor in my grammar and vocabulary. Actually i can speak but sometimes my grammar and pronounce is broken in certain words. talking to in front of public, i will feel nervous. Afraid, I guest this is the biggest problem why it is hard for me to use English in public. I am also afraid when everyone will laugh at me.

Therefore, I made a few ways to cope with these problems. First at all, i will try to overcome the shy by trying to speak in front of a mirror. I may take about five to ten minutes to speak with that mirror. It might sound a little bit funny, but I am sure this technique will work someday. Then, I will try to practice on using English when speak to my friends and also when i am in the classroom. I need to throw away that feeling. Before that, i need something such as spirit to help me to reduce that feeling. The thing that i am talking about is me courage to overcome it. Read more books and try to speak very well, after that do some practice in a study group. Hopefully, these ways might come handy for me in the way to overcome my problem in using English in public.