Ok. Well Ill list my favorite starters then:
35mm Film: Olympus XA (XA on ebay) or Leica LC-A (LC-A on lomography)
Instax: 50S (50S on Amazon) (not really a starter, the only one you’ll ever need)
Polaroid: Well, this is harder to answer. The best polaroid camera, in my opinion, is the SX680. But its pricey unless you gamble with getting one from ebay. Its less risky to hunt for a cheaper polaroid camera on ebay to just start. Just try to find something that’s in your price range that says its in working order and then order film from Impossible Project Film. If you have the money to go with one of their refurbished cameras right out of the gate then definitely look HERE.