I need help with girlfriend?

I've been talking to my female friend for like 9 months already. She is starting to twirl her hair while talking to me since like 3 weeks ago. I think I'm attracted to her. I think girls who do that are really cute. Should I ask her out? She touches my arm while I am talking to her too. It would be great if I do ask her out and she accepts. she'll be my first girlfriend if she does like me. How do I start holding hands and kissing and everything? Does it have like a good time to start doing that? Should I ask her if she want to be my girlfriend during the date? or is that awkward?