Crush sent me her number on Insta. I have some reservations and I’m a little awkward and need some advice lol

This is gonna be a little long lol. So I posted on here awhile ago about a friend of my cousins girlfriend who had recently become single. She had recently gotten out of a very long relationship and I actually got some really good advice on here about it. Anyways, she became permanently single a few months ago and we saw each other on Super Bowl Sunday. I was super drunk but I remembered a little bit of a connection, she kept asking me questions and giving me attention, which she didn’t give to any of my other friends who were there. She’s mentioned that she’s comfortable around me to my cousins girlfriend in the past. Recently, I talked to her on Instagram DM about how awesome her art was and we found out we share some similar favorite artists. Anyway, I went out for her birthday on Saturday with my cousins girlfriend. I only spent a few minutes with her, the conversation was light, but spent time talking to some other dude. Her friends didn’t seem to like that guy. After everyone left to go to another bar, my cousins girlfriend and I spent some time talking before our ride got there and she said her friend doesn’t know what she wants ATM. Then yesterday she messaged me saying it was great to see me and if I want to contact her going forward to use her cell, which she provided. I want to go for it, but don’t want to be a rebound, as I only want to pursue serious relationships going forward. I think I’m gonna call her and ask her to get coffee or something later this week. Any advice is appreciated!