@kravietz I wonder if there are any good cave systems in Michigan
Just find a local caving club, they routinely organise courses for beginners and this is the best way to experience actual caving - you will learn all the proper rope ascent/descent techniques, and if you're into biology you'll have chance to meet all the right people. There's a whole group of biologists doing research in caves - mostly interested in bats, spiders and these crustaceans, and they're always looking for volunteers e.g. for bat counting.
@kravietz I'd settle for any sort of cave at all, really! Caves of all kinds are awesome, I was just highlighting some of the most wild cave discoveries made in the last decades because they're WILD