Do you have social skills? Because I don't!?

Hey. I was raised in a very diff. culture than most people. My parents were extremely overprotective to the point where I never went trick-or-treating on Halloween and I was not allowed to attend any birthday parties or go over anyones house until I was like 14. Now I really lack social skills. I simply either come off too shy, cold, or too talkative and annoying. It just seems like I can't get a balance. It is very hard for me to make good impressions and as I am growing out of my teens I am afraid that I won't be able to "survive" out there and get a job, have some good friends, etc. I have friends but they are not that close to me and we rarely really hang out, only like once in a while. Can anyone give me any good social skill tips that have proven to work for you? For example, how do you avoid coming off "too friendly" and insincere? How do you avoid looking cold and mean? Should you talk first or let the other person approach you first? etc. Should you avoid talking too much, too fast, etc.? What should you talk about with people you just met or are unfamiliar with? Thanks!