>>317001570
It's remarkably easy. In fact with the new prefab it just pretty much spoonfeeds you everything—you get big buttons that even scream at you RIICHI, TSUMINO, WIN, and RON if you discard the right tiles enough times. The very bare minimum you need to know is getting 3 suites and a pair with the same tile sets; something like 123 222 555 (sequences or triplets of the same tilesets) Starting out you don't need to even know any hands since it already keeps track of what you need to know.

https://www.youtube.com/watch?v=mcmQqPhKvWg&
https://www.youtube.com/watch?v=wBDdL_8ijTM

Don't overthink too much about the terms this dude is saying, just the general idea of what you should be doing. Basically, you want to get 3 suits that are either sequence of the same tile type (like bamboo, chink, and circles) or triplets of the same tile in the same tileset (so 3 tiles that are all 4 circles). Hardest to remember are the chink 6,7,8,9 starting out but just remember the 6 looks like a running man, 7 looks like a t and 8 is easy to remember as an uppercase A without the line in the middle.

Also, it's usually recommended not to open your hand, which means CHI and PON, and sometimes KAN. You can auto-disable calls (CHI, open KAN, and PON) but because of Udon it will reset when some goobler joins the instance, so you have to be careful about that.

When you're about one or 2 tiles away from winning, you can declare Riichi, which will prompt a box in the middle of the table with a small white stick in it, and I think there's also a prompt at your side. Then you choose a tile you want to discard (the one with the highest choices of winning tiles) and wait, then click the TSUMINO or WIN buttons if it doesn't exhaust draw.

I play casually—as we all do—so I don't keep track of any yaku. So don't stress if you don't understand any either. Sometimes I bullshit out of luck and get big ~12000 hands and sometimes I get cheapstake 1,000 hands. A win is a win so I can't complain.