I’m about to turn 21, worried and anxious about drinking

I used to be a HUGE stoner, smoking 24/7 need it to function stoner. I never have actually drank without smoking as well and the only time I did drink without smoking I threw up the one shot I took (it was the 99 shots so it makes sense). My friends want to go to a bar or restaurant and get some drinks, I’m worried about the burning in the throat and stomach. Or the “hangover anxiety”. Maybe even a panic attack starting when I feel the burning. I do want to drink a little bit though, any tips?