>>528094962
That sounds so sad, I'm sorry anon. I've been in a very similar situation and it forever changed my brain chemistry and likely gave me massive brain damage.
I wish you all the best luck.
You can find guides to chinese mahjong on the internet, it's a very simple game.
But first you should use a translator and ask if they play chinese or japanese mahjong as well before learning the games.
For riichi mahjong there are a lot of guides in the OP, at this site https://repo.riichi.moe/library.html#resources-toolz
For chinese mahjong I don't know, but I'm sure you can find things if you look for them.