Definitely go with 2 starter sets a few boosters if possible. I would try and stick with the base set until you’re happy with the quantity of pieces you have. Infantry can be more effective for you when you have units in quantity to choose from. I’ve been playing Axis & Allies for almost 20 years and find this version most enjoyable. I could never get into those war games that come with a book and pieces of paper for pieces, nor did I have the patience for painting GHQ miniatures. I find Axis & Allies Miniatures to be a compromise that fits for those who feel the same as I do, but want more detail in Axis & Allies itself.