I began my diving adventures in Michigan. Diving in Lake Michigan is a chilling experience. Wearing a wetsuit or drysuit creates positive buoyancy, so weight is needed to be able to descend into the lake and stay down at depth. Water visibility is generally 10-20 feet. There aren't a lot of fish to see in Lake Michigan.
Shipwrecks are the main attraction for divers.
There are quite a few wrecks offshore in 50' of water or less. These dives can be intimidating due to lack of light and decreased visibility. Also, zebra mussels have overtaken the shipwrecks, completely covering the metal or wood the vessel if made of. Michigan's inland lakes provide a wider variety of fish to look at. Diving at night in Wolf Lake in Muskegon is quite fun.