you bought the wrong car to drift with if you plan on going any farther than just having fun...
and i VERY seriously doubt any businesses around here are gonna be okay with risking liability and or property damage to let you guys drift. waiver or no waiver, there is a liability. what if theres a car parked in the lot and it gets hit by a "drifter". no, YOU cant sue them, but the owner of the other car can. or what if somebody slams into the curb, a lightpole, or even worse the front of that building. they would be screwed even if YOU paid for it.
also, if a car is too loud and it is night time, you CAN get a ticket for disturbance of peace or something similar.
tires are good to have, but you will not find any local company to allow this in their lot. it just wont happen.
use the opportunity you have for free tires and burn them off at a real event, where theres instructors and other helpful people there, because i PROMISE you will not learn very much on your own. your comment about being a good driver is an uneducated and very possibly false statement. going fast on the street doesnt make you a good driver. if i were you, i would start by going to autocrosses and learning how to control a car, and maybe even throwing it sideways there.
btw, "drifting" will ALWAYS be slower if you are talking about formula d style driving. if you are drifting that means that you have broken traction and its basically the same concept as locking up the brakes. you may still stop while the tires are locked up, but not as fast as you would had they not locked up. loss of traction = loss of traction no matter what.
