Because it's much more complicated to install a ceiling fan than a ceiling light fixture, you might want to consider having your ceiling fan put in by a licensed electrician. Ceiling fans need additional support from above and need to be anchored solidly to a stud (fan rotation can work metal screws loose.)
The next time you’re at the store, pick up an extra paper towel holder. When you get home, install it in the front section of your garage and insert a roll of towels. The towels will be accessible and handy for checking the oil in your vehicles and other quick clean-ups. The holder will also help you avoid fumbling with loose rolls or searching out rags.