Let me preface this with a quick anecdote. I once knew a guy who is a young virtuoso on guitar. Very, very talented. He like to bring his acoustic to parties to jam with other musicians there. He got a lot of attention when he played a finger-picked remix of the Super Mario Brothers theme. Some guy asked to borrow his guitar, so he loaned it to him. The guy proceeded to plunk out a Blink-182 riff a couple times until a girl came up saying, "I love that song! Do you know any others?" When she came up, this dude was all smiles. When she asked that question, he stalled. He admitted that was the only tune he knew how to play. He plunked it out again hoping to hold her attention, and she wandered off without another word.
The point of all this is that if you want to show her your hobby, that's fine. Do that. But to really impress her, you need to put in a bit more effort. Take her some place different or unusual, preferably somewhere she's never been before. Offer suggestions of venues, food, places to go. Places you know well. And for god's sake, don't do what millions of other guys do and just try to impress her. Make it about her and trying to give her a cool experience. Most women would rather go to a restaurant they've never been to and try food that they ultimately didn't like then have to make all the decisions herself while listening to the guy desperately try to impress her.
If you've got the chops, one or two things is all you need. Then put the cards away and just talk to her.
How well do you know this girl?