Check out planet rock in Madison heights, good gym ( kinda weirdly strict staff though). Grand ledge has some decent top roping and the UP has some surprisingly good sport and trad near Marquette as well as the copper harbor area. In addition to that there's always really good stuff over in Ontario not more than 5 hours from Detroit (closer than anything except grand ledge or the gym). Absolutely down to hit up grand ledge later this summer/ fall! Best of luck to you and keep the stoke high!!!