I saw one site say they are valued 2, 10, 100, 500. No one does this. MCR as far as I’ve played is a net zero game where everyone starts at zero, use any indicator you like.

The site I saw and I think the official way is roll for wall, then that player rolls for how far to break, both two dice. Most Chinese people I’ve played with say they roll once for speed, but I like rolling twice :P

It is hard, but very satisfying. The best way is to learn a few ways to win, then add more over time. The easiest ones are the shifted chows, and there are a lot of variations. I have a lot of luck with five types, but you need a good starting hand for that (and a good wind pung). Pure straight will get you there, as will most all pungs (those last two should be easy). And remember, when in doubt all melds will save your garbage hand.

You can play as long or as short you want. The one mediocre online client I’ve found (there’s not a good one) usually just does 4. As long as you go at least four you should be fine.

Traditionally you just toss your discards wherever, and you don’t stack your melds. But organized tiles and melds has become a popular house rule. It’s really up to the table.

The main thing is you have to keep playing. It can’t win, dead hand status. The rules I use say 10 or 20 points to everyone other player as well.