The idea is that playing Mahjong is fun, so learning to play Mahjong should also be fun

Currently, the website has a section that explains the general rules of Mahjong that are shared between different Mahjong versions (common core rules), and a section that teaches MCR (Mahjong Competition Rules, aka Chinese Official). A printable reference card can be downloaded for MCR. In addition, reference cards are provided for SBR (Sichuan Bloody Rules) and for Singaporean Mahjong.
Planning for the future, I am considering adding Riichi, but it is a lot of work. It depends on whether people are interested in seeing Riichi also explained in this format. Please let me know.
Any feedback will be very much appreciated

The website is called “Mahjong Picture Guide”, http://mahjongpictureguide.com . It had been up for some time already, but it only had the general rules and the reference cards. Now I have added MCR and made a lot of improvements.