I always play a new A&A game the same way. First time through I play the new game as the old rules with a new setup and a new unit or 2. Second time I read the rulebook first and play through checking the rulebook on every move as I go. Takes forever but I normally only do this for 4-5 rounds. Third game is playing the game start to finish trying to remember the rules without checking the rulebook but if I have to then oh well. All 3 of these games are a me vs. me games just to learn the rules.
This learning tactic is what made Battle of the Bulge and D-day such a pain in the ass to learn.