out of hrt? then you're in luck because in one hour(or more or less) you can pick some up at the chiitoitsu mahjong parlor, right over the counter!
world link posted at that time

don't know how to play?
LINK graciously borrowed from /mjg/: https://repo.riichi.moe/
and if you don't like reading, here's a mahjong starter: https://www.youtube.com/watch?v=mcmQqPhKvWg&t=5s
and his basics playlists: https://www.youtube.com/playlist?list=PLPBLBlC-7G3s92GyGOprSmZ1mqgh0U0DI
(don't worry about the setup)