I bet you end up having a great time at that concert, no matter what you end up wearing. I hope you do! You've put a lot of serious thinking into your identity and gender presentation. Sometimes, it's good to just let your hair down and have fun.

And you know, the most attractive people are those with the confidence and self-grace to rock their own style.

I have the feeling you are that kind of person. Whatever label you use for yourself, lesbian or not, queer self confidence is beautiful.