Each of the archetypes have a level 4 basic feat that gives you access to the level 1 or 2 class feats of that class. e.g basic discovery, fury, muse's whisper, dogma, wilding, maneuver, kata, benediction, hunter's trick, trickery, blood potency, or arcana.
No, as they don't have a special line allowing it. However, there is no need as you can just take Advanced X next time you get a class feat, and that can be taken multiple times.