You can get shy, nothing wrong, but stay with it, that makes it beautiful. Whenever you show yourself the way you are, you are beautiful.
No need to have experience, (I know, there is a big pressure: you are 19 and are supposed to have experience). But things are the way they are. So your task is to become friends with yourself the way you are. That step will make wonders, because once that is integrated inside you, you will irradiate it outside.