Most Helpful Guy
It's never easy to talk to the girls that we like. It does come down to experience and confidence.
Learn, practice and practice.
There are plenty of resources available on the internet so you might want to do some reading first. Also, hang out with the guys who can easily talk to girls. See what they do and try and pick up what works and what doesn't. Try to 'imitate' them, like using their lines.
Join a large group. Volunteer groups are generally good, because people tend to be a little more understanding. The more you talk to girls, the easier it becomes to talk to them. This is a good way to build your confidence and experience at the same time.
Also, try to push yourself out of the comfort zone. Do something eccentric every day. As you do, you will be building your confidence.
I used to be extremely shy to the extent that I'd be almost frozen when I was talking with girls, let alone girls that I fancied. Not anymore.