Your son can still play even if you're not very good.
I'm terrible, and my son beats me 100% of the time (he first beat me at age 3). My husband is better than I am but still loses to DS about 60% of the time (he was a chess novice like me when we started with the game, but has worked much harder on his game, madly studying tactics on his phone). It's kind of fun for me to see my DH lose all the time--he's really good at everything!
Your son can learn from computer programs and apps--there are a lot. A club is better, though.
