Drinking your first beer is like loosing your virginity. You want it to be a special time because you will remember it for a long time. you don't want a pro on the other end, but you don't want dumpster junk either. So I'd suggest a nice mild amber beer. Something like Sam Adams Boston Lager, or Backpocket slingshot dunkel. Or a slightly heftier less pretty girl like Michelob AmberBock. Getting your friend something like Budweiser or Bud Light is the equivalent of buying your friend a syphilis riddled 60 year old prostitute. You only do that if you really really hate your friend.