That's a very broad question. Here are some suggestions to help you confidence: go to the mall and speak to store assistants, ask their opinions etc (you can actually get into good conversations). Join a club where there are a lot of chicks. Speak to any chick you can, e.g. your friends GFs, a chick in class/at work. Just practice. Importantly, realise they are just human beings, they are not frightening and there is nothing to lose.
Take it step by step, first off build your confidence talking to chicks, then being comfortable just being around them (not feeling any need to perform/be accepted/wonder what they think of you), in the end after time you will have some chicks who are "friends".
You can have a conversation with a chick just as easy as with a guy - maybe easier, as once you get them talking they usually carry it.