Keep it Simple , a bottle of vodka straight or wiath sprite or a bottle of jack straight or with some coke.
Also for someone who said something about this earlier, unlike popular belief, the worst is when you first take beer and then something else. the gas in beer iritates a layer in the stomach wich makes alcohol being absorbed faster so the drinks after beer will be worst.

Im younger then you but been drinking from when i was 14

have a NICE BUZZ 21 BIRTHDAY!!