>>7
I guess it's decent enough, I was lucky enough to learn by friends teaching me irl then got better at it using the flash mahjong game against AI and then using a phone app in my spare time.
Not sure why you're getting an error, anon. Might want to try using a different browser to log in and learn from there. I know FFXIV also has a Mahjong aspect to it in the Golden Saucer if for some reason you're playing that.
For me, I just understood it by playing more. Once my friends taught me the basics they threw me into a game and I had to figure it out myself. After finished two rounds I remember watching an episode of Akagi right afterward and being stunned I fucking understood it.