Long story short: Go fly with an instructor once or twice, build a rapport with the place you'll be renting.
All that certification stuff is great, get your mil comp, etc. But I know plenty of dudes who went into flight schools or FBOs like a big swingin' dick with their new wings and have almost killed their family, or been asked not to rent from the airport again. If you didn't start in GA or haven't flown GA in a while its really worth it to humbly go fly with an instructor for a ride or two, and just listen to them. The whole time you might be making fun of their multiple knee boards with information on the closest 69 airports, or the way they make radio calls like their flying AF1, but it'll be worth it in the end. UPT doesn't teach much about VFR flying with the rest of the civilian populace, and if you think you can take a rental airplane on an IFR adventure in the weather, I'd strongly advise against it.
Not a holier than thou type of speech, it's just embarrassing to go rent from somewhere and hear from the school about all the AF guys who said they knew what they were doing and subsequently did not.