Lancer Evo's, if you want a fast car with practicality, are great cars. Shop around on autotrader. I don't really know what you're looking for in a car, but I can tell you should get something which has 4 seats, gets good gas mileage, and is reliable. If it's cheap/easy to fix, that's even more of a reason to buy. I had a minivan as my first car. Then I had a '96 Buick Skylark. You don't always get what you want when you're young. I can tell you I still autocrossed that Skylark, despite how poorly it performed.
Possibly the most enjoyable car you can get at your age is something that fits the criteria above and something you can work on yourself. Fixing things on your first car is a pretty fun learning experience. A XF would only make that harder, more expensive, and more aggravating. If you want to get a good example, without any help from the internet or anyone else, time yourself and see how long it takes to find the air filters on a XF. It's a routine maintenance job to change them every 60,000 miles (or sooner if you like, I change mine every 20-30,000, sometimes sooner). If you can find that, try finding the cabin air filter, which needs to be changed every 18,000. If you find that, find the oil drain plug. It does exactly what it sounds like, and you need to be able to take that off every 7,000 miles. Those are the simple things, just routine maintenance. That's an illustration of how another, simpler car would be a much better match. Honestly, I would go with anything somewhat older and Japanese-made. You can find some pretty quick rice-burners for pretty cheap. They'll be reliable, easy to fix, most likely have 4 seats, and get great gas mileage.
EDIT:
Here's edmund's True Cost to Own-
2005 Chrysler Crossfire True Cost to Own ratings at Edmunds
Granted that's based on if someone bought it new in 2005 (All years are the same, except the 2005 which had the auto-dimming mirror). Just subtract financing and depreciation. Or better yet, just look at the fuel costs per year. It'll cost the price of the car in 3-4 years.