How much could I likely drink without getting drunk?

Oooh geeze, I have no idea what I'm doing! lol. I'm about to turn 21 and someone got me thinking about what my first drink should be. I found a recipe for one that looks really pretty. Oddly enough it will actually be my very first drink, so I have no idea what my alcohol tolerance is.

I'm 5''1', about 120, and I do know to eat something carb loaded before I go out. The problem is, I really do not want to be drunk AT ALL. Buzzed is okay, I can wait that out a few hours and be fine like everyone else does. I'm just afraid to get drunk!

My recipe calls for a million different fruit juices, sodas, etc, but it has 2 oz of vodka and half an oz of Hpnotiq liqueur.

Do you think I'll be able to handle it? or should I just try a wine or something on my birthday?