I don’t want anything too complicated. I’m sitting here with a deck of cards in front of me and I want to play a simple fun card game. Please help

Fun card games for 4 people, we’ve been playing Bullcrap, or bull**** lol we know some poker games like 31, and of corse five card draw and the like, but i wanna know some good ones, i looked it up and there was a billion different card games, but some of the rules where 2 hard to figure out, and i don’t know which ones are fun, so what’s you opinion?

Just looking for something fun to do during school or something. We like to play cards haha
We play Mau and Egyptian Ratscrew and stuff like that but I was wondering if there were any other fun card games for us to try.
Nothing stupid and childish like Go Fish but nothing to complicated like Poker.