Did the Maya have showers?
Of course they showered!
Where did the Maya find jade?
There is an area in Guatemala called the Motagua valley, which has lots of jade that the Maya would have mined.
Did the Maya go to school?
There would have been some form of school, but unfortunately, we know very little about it.
Did the Maya have a board game, because when you came I looked at a Maya artefact that was like a tiny pyramid for a board game.
Not that we know of, though they could have. The pyramid you mention was more of an ornament.