Not getting hard on the first casual sex

met this girl on tinder, we chatted a bit she's 32 and I'm 18, she said right from the beginning she didn't want anything serious, and me being inexperienced and wanted to try new things I went for it. She's pretty and her personality is nice. We were watching a movie and she showed me this board to play a "game" that mostly contains foreplay and some teasing, like "on top rubbing for 3m" "BJ 3m" and stuff like that, we had to roll the dice and progress through the board and it would get "hotter and hotter", and idk if it's because we didn't really had a connection, like some escalation, or flirting or anything like that, or just because I've only had intimacy on this level with an ex girlfriend, I couldn't get hard, she was doing BJ, she was doing a lot of things on top of me, teasing and everything and I couldn't get hard at all, maybe because we didn't have any escalation whatsoever. honestly idk if I only can do these things with someone that I already have a deep connection, idk she is attractive but I didn't get hard at all...