my self-introduction

I rewrote it to sound more natural: 

Hello, I am a college student in Wuhan, Hubei. I've met many foreigners in this city, however I don't ave the courage to talk to them because I am not confident speaking English. I've studied English for a few years, but didn't do well on my exam. Can you give me some advice about learning English? I would appreciate your help. 

My advice is just try your best to speak to them. Chatting with people isn't an exam, they won't care if you make mistakes. Sometimes its difficult to do the first time, but once you try a few times you will find there is nothing to be afraid of. If you are interesting, people will want to talk to you even if your English isn't very good. The more you talk the better you will get. Just make sure that people don't think you are using them just to practice English, that can be annoying to them. As long as you have a genuine interest in talking to somebody, almost everybody will be happy to talk with you. Go out and give it a try.