First time buying alcohol for my 30th birthday party? What are your recommendations?

I’m (30F) hosting a get together at my place for my 30th and only probably 6 out of 12 of us drink. I’ve only ever had a drink when I was out for dinner and got like a sunset soda or Diet Coke with vodka. What do I get that would be enough, but not overkill, for this occasion? I’ve also never gotten drunk and low key want to since it’s at my apartment with people I love and trust.

I also live in Canada!

Thank you 🙂