my mistake

I am very shy. I don't dare to talk to people. When I meet something (We don't meet things. You meet people, and sometimes you'll "meet" theor animals like cat, or dog.) or someone people, I always shrink back. I want to learn English, but I always give up.

But This time, I think I must insist in this way and study English again, no matter how hard, I will insist. 

or

This time I think I must persevere (which means to continue in a course of action even in the face of difficulty) and continue my study of English. No matter how hard it gets, I will persevere. 

You our can do anything you set your mind to! If this is something you really want, I am sure you will reach your goal.