Should I cancel my first date with someone who enjoys edibles?

Kind of in a predicament here and would like some advice/perspective

A few months ago I (20f) met someone (20f)at my community College who gave off good vibes to me. Over that time, we've been bonding a lot, and very quickly became close friends. Recently they asked me if I was interested in dating or even having a potential relationship, to which I agreed since I do like them and find them attractive

A few days ago however, I learned that they have recently taken up cannabis. Their brother came out of town and introduced them to vaping. They said it was a really intense experience, but really liked it even with the intense coughing and terrible smell. Then they texted me in a very stereotypical way for someone who's high, saying that they love me and really want to drink out of the same slushy with separate straws (I don't think they meant anything they said, personally)

This immediately made me extremely uncomfortable. I talked with them about it once they were sober, and they said that they don't really want to do vaping again since it made them feel kind of bad and it smells terrible. But they would like to do edibles every now and then with friends as a way to have fun, which is very vague to me in terms of frequency. They also said it's not as bad as alcohol, so that's one other thing too I guess?

I really don't know how to feel about any of this. I personally have always deeply despised drugs and avoid them at all costs. I know there are medical benefits with cannabis and that it can help with sleeping, but even then I still think you should avoid it. I just really don't see why you would compromise your health like that for a rush

I'm debating on if I should just cancel our first date entirely and just remain friends (if they even still want to that is). I really don't feel good about this now like I did before, and it feels like they do intend to keep this a part of their life. I mean, I do like them a lot as a person, and every other aspect of our compatibility is pretty good. I would genuinely like to date them, especially since I know they do like me quite a bit. But this one thing has me really doubting if it could actually work. I'm thinking that maybe I'm being hyperbolic. Afterall, it was their first time and they are still young, so maybe it won't stick like it does with people who have done it for years. I also know people can quit, and since they were introduced to it from a brother they barely see, maybe it's a case of outside influence. But given how they really liked it and have expressed interest in doing edibles every now and then as a sort of treat, I'm skeptical if any positive change will happen, or if it'll spiral into abuse/addiction

Does it sound like I should break it off before anything potentially bad happens, or am I overreacting? Like I said, I do like them in every other way, and I know they're excited about seeing me. I'd really hate to get cold feet last minute and hurt them, but I don't want to compromise myself in a way that maybe doesn't feel right