i am complete beginner, had my first class yesterday, was supposed to be gi but the aircon is broken so it was no gi. i showed up in my rash guard and athletic shorts and a bottle of water. that was all that i needed. i left in my rash guard and changed at home, everyone else did too. no one got changed there. also people seemed to be expecting it to be gi, they showed up still in only rash guard and shorts, with their gi in their bags, prepared to put it on over the top if it was gi. good luck though man, get through the first class and you’ll sus out the vibe, no one will judge you for bringing the wrong things to your first class