My niece and nephew were admitted to UMich both with ACT 28. In state from a low performing school with high GPA. Not into engineering or CS but whatever Michigan calls their arts and sciences.
So for some in state students, they can be admitted with lower scores.
I would advise OP to take the ACT also. Both of my kids did significantly better on the ACT.
But personally I think there are great Michigan schools other than university of Michigan where the OP could be very successful.