What should be used to introduce a new or potential player to…
Use whatever interests them.
You are assumably playing this game, this teaching game for them, to help them, to expose them, to pilot their ignorance toward their curiosity with a steady hand – and not for you or your interests. It doesn’t matter what game that is, how unapproachable or complex you think it might be, or any of the rest. That’s your head, your evaluation, your value system and not their’s. They are interested and that interest is effectively the universal solvent for any and every problem.
Oh look, I got completely smashed and destroyed and I have no idea how or why that happened let alone what I could possibly do about that, this is incredibly confusing and I simply have no idea…isn’t that interesting!?”
And lo! That implacable unconfrontable morass of a game gradually dissolves before nothing more amazing than someone just being interested. Don’t waste the primary weapon and faith the other player is entrusting with you.