[whatusername]

As someone mentioned - the "Arena Starter Kits" worked for us as an intro to the game.

The basic rules around commander aren't particularly additionally taxing beyond that. (This is your special card that you can play every time. When it dies it goes back to its special spot and it gets more expensive each time you cast it). What I like about the commander format (in the few pre-constructed decks I've bought over the last few years) - they can really lean into a theme/strategy more - and the commander really guides you in how to play this deck.

Start with those arena kits - they are cheap and handle the rules. But if your son sees a commander deck that resonates with him (in theme or mechanics) -- I'd recommend giving it a shot.