Open the app, and hit the wrench icon on the lower right. Then hit Service History, and on the top right hit Add, and you can enter service info. It is a very good thing to do if you do your own oil changes. I think to make it stop telling you an oil change is overdue is to reset the oil life...
I had been asking my wife to back into the garage, she preferred to drive in until the day my son parked his lifted jeep behind her. She hopped into our hatchback, hit the door opener and tossed it into reverse. It was a very expensive lesson.
I tow with a Grand Cherokee which is a unibody, and Jeep requires a weight distribution hitch above a certain weight, can't remember what the spec is but it does a great job and has integrated sway control. The problem is that that they are heavy and OP is already exceeding the tongue weight.