early on you don't really want to get too attached to a hand. if you raise 3x like normal, you will stick get any nutball to call for such a small portion of their stack. Ideally you want to get 3 bet. OOP just flat. In position, you have the option of 4betting but i prefer to flat here as well. If you flop your set, figure out a way to get all the chips in the middle. If you miss, make standard cbet. If shoved on, you're probably in bad shape. People have so many chips, they will call you with K5o or other trash. Just be patient. Early in the tournament just sit back and try and get a feel for the table and if there are fish there dying to be stacked off.
Frequently at the low buy in tournaments, you're not going to get someone to fold preflop while the blinds are cheap. I'd make the standard raise and just give it up if there's too much pressure. Abuse these fish. Get your tptk, hit your broadyway straights, nut flushes and jam them. They aren't folding so dont get fancy.
Also last thing, at low buy in tourneys in the early stages. Don't bluff. They will call you don't. If you have Kk and there's an A on board, they will see you at the river. Even if they called you with A2o, they aren't letting go. So instead of bluffing
them, ram your nutted hands all over them.