Ket first time, kinda confused

Me and 3 others have tried ket for the first time tonight, and we're all kind of underwhelmed. i'm very experienced with mdma, acid, weed, but I'm not really sure how i should feel right now. I've done 2 lines, but i'm aware i'm probably being too cautious with how much i'm doing. we're thinking about sharing a joint to see how we feel but i've read it can send you into a k-hole and i want to keep clear of that, at least for my first time.

i don't know much about k, despite reading as much as possible on it before tonight. Should i take more? Would a joint be a bad idea? Any advice at all would be helpful, thanks