Find out the blind strucutre, it is probably not a secret and if you ask you will be given it.
Since it is a live game with many people not aware of the game, you can assume about 4 minutes per hand.

Your game plan should be planned according to the blind structure.

If they go up very fast you cant sit tight for too long, usually you can sit out about 2 orbits, figure who is who and play only very strong hands.
Later on you have to go mainly into raise/fold mode, play your hands agressively, try to play vs 1-2 players, play good positional poker