Ok..gross but let’s get it out of the way. Clean yourself out before you go. Also take some flip flops for walking around so you don’t get athletes foot. If your bath house does not supply condoms and lube take some with you
Now for the fun stuff. Just go and have fun. If you are a bottom like me there is lots of cock to suck and fuck. Check out squirt.org to make sure you go when it is busy. Most disappointing thing is to one of these places and be the only one there.