first time ordering at a bar

Hi! This is really dumb but I’m 19 and live in the US but am going to vancouver for a concert where the drinking age is 19. I don’t really drink alcohol very much but it just sounds fun being asked for my ID and being able to do something i’ve never been able to do before lol. The only alcohol i enjoy is tequila if that helps. I basically just don’t know what to order? Or how to word things without sounding stupid. Basically just what should i order and how?