Why am I such a lightweight?

Hi I just turned 21 a month ago and I’ve been going out to bars and stuff trying to see what my tastes are. But Jesus Christ I’m so light weight!! I always have been and I get mad about it because I can never finish a drink I get so messed up so easily.

Only thing I’ve been able to drink and finish was strong wine. But my stomach doesn’t handle it very well, not hangovers but just in general.

I’ve gotten coronas because they’re my favorite. Had a bud light because they didn’t have corona at a bar once, and it got me drunk the whole night and I couldn’t even function from just drinking half of it. I’ve had rum sodas before 21 and then a White Russian which didn’t do anything.

How do i get my tolerance up?? I wanna be able to enjoy a drink by finishing ittt.