The best years of your life are the ones in which you decide your problems are your own. You do not blame them on your mother, the ecology, or the president. You realize that you control your own destiny.
planning on starting with some tequila shots, and then going to mixed drinks with rum.
Depends on you and how much of a drinker you are (if you can handle your liquor)
I've drank Tequila and rum on the same night and never got sick. On a few occasions I'd throw down a Jager bomb in there and I was fine.
It's beer with hard liquor that you aren't supposed to mix because it might cause you to get sick. I've never drank beer (just tried it and didn't like it) so I can't say for sure but that's what I've been told by people who have done it.
It just matters how much you can handle. Most of the problem comes from people doing a few shots and then the shots start going down smoother and they lose track of how quickly they are dropping them. Smart move if you aren't a big drinker is to just do a few shots then switch to beer.