As a guy, who is/was extremely introverted by nature. Who worked really hard at getting really good social skills, that most people never never believe I used to feel awkward, etc. I can completely relate. I think the problem isn't the fact that you don't have social skills. She probably wouldn't be talking to you, if you didn't. But as I read this, I get the sense like you don't have confidence that "you are just awesome."

Don't over think things, especially if you like the girl. The best thing you can do is be comfortable with yourself. (Which leads to confidence.) Confidence in a sense is, just being completely "grounded/solid" regardless of what happens around you or in the face of ambiguity.

Try your best to align your thoughts, words and actions.

Upside, is it guarantees she likes you for you. Because you are showing your true self and not trying to be gimmicky. (That's where overthinking, can mess things up.)

Don't feel like you need permission to say something or justify if something is cool. If you think something is cool, it's cool. Period.

Even if they don't like it, it doesn't mean it's less cool for you. It just means they don't like it. The world won't end and there is more to you than that topic or thing. Then just keep talking (Hope that makes sense.)

If you find her interesting. The conversation should go well, because your curiosity is genuine. Now, where most people mess up, I think. Is they end up asking interview like questions. That isn't a conversation, that's someone taking information from the other. So when you ask and they respond. Actually put in an opinion of what you think about her response, then ask another if you want. That way, it flows easier. (Go with the flow, if you want to ramble a bit do it.) But you are showing the other person your personality. When you can tell the person gets excited about a phrase, stay near that topic and you will find out, that everyone is interesting.

Funny thing is, the more comfortable you become with you. The more comfortable other people around you will become.

Hope this helps a bit.