Here's the new revamped rulebook for Yomi. As always, you can find the latest version at www.sirlin.net/yomi/rules
This version is longer than the old one, and goes into more detail on things, and gives more examples. Also it advises new players to skip Jokers, knockdowns, and "mixup normals" for their first game. I think saving that stuff for later makes the game a lot easier to pick up.
If you're getting new people into the game, try showing them this new version as a bit more friendly way to ease them into the rules.