Nice, what car are you getting? Well, this is your first car, you WILL scratch it! Dont worry about esthetic upgrades, you can add them as you go. I strongly advice you get a couple of 'safety' features though. They arent cheap (nor expensive) and you cant install them yourself, but they are good. One is call carter protector (?). It is a steel plate the put under your car to protect all their pieces in case you go into uneven terrains. Also, there is the rear parking assist (kind of an alarm to tell how close you are to the wall), it is fucking annoying, but it is very helpful. Leather seats are great as well, specially to keep them clean and with a good smell, but it is more of a high end luxury accessory, so it will come down to how much money you have to spend. There are some more, all of them are cool, but just as unnecessary! I hope you have fun, the first car is always special.