Some resources if you want to learn and player riichi, the japenese variant TLDR: Download both Mahjong Soul and Kemono and play a lot. If you don't understand something then look up on the riichi wiki or ask the mahjong reddit or the Mahjong Soul Discord. It's much much easier to learn riichi through a game then buying a set and sit down playing. Especially if it's 4 brand new players together. Mind you riichi/mahjo…
Riichi City gives you the score you'll make when you declare riichi or declare winning, and also shows which tiles were discarded just after being drawn in the discard piles. Mahjong Soul doesn't do that.
It's also like, straight up softcore porn with the avatars. Which is fine I guess, but I feel gross playing it in public, which is annoying. Mahjsoul is not a lot better there, but a little.