What I usually do when I teach new people is to focus on the basic game mechanics first. For the first game (and maybe the second game if they need it), I tell them to ignore all artifacts/sites/special abilities (except on Doms). This way, then can get the basics of the game down before you throw the book of special abilities at them. I've learned that that's the best way, for me, to teach others (since I only have e/f and g/h starter decks).