I use first or reverse when parking, with ebrake. On hills, I usually use a little plastic wheel chock thingy from amazon. Having owned lots of old Italian and other unreliable cars over the years, I have 5-10 of the little plastic wheel chocks in the garage that I toss 2 of on top of the spare tire in each car. Makes roadside jacking (lol) feel safer, and parking on hills.. well if you own an Italian car from the 60’s you know that trusting the ebrake to hold a car is foolish. They’re dirt cheap and make roadside repairs a lot safer. I also have a bunch of tiny air compressors (the size of a sandwich) in each car.