My sister said that I never play mahjong. How to reply humor?

Can reply: no, it doesn't matter, I can teach you! As long as you are willing to learn, I am honored to give everything and enjoy teaching, depending on whether you are willing or not. If you really don't want to learn, then I'm not forced. We can find other entertainment. What do you like?

What else do you want to play besides playing mahjong? You can tell me and I'll play with you.