If you bought the car be proud of yourself and if your parents bought you the car be proud to have such generous parents. I bought my first BMW when I was 19 and have been in love ever since.
For mods, Brusk speaks the truth! I feel that I can drive well but have a ton to learn at 32. One of the best things that I ever did was go to a test and tune auto x event and ran the car with one of the organizers in the pass seat coaching me. Not only was this more fun than one should have I learned more about that car and its limits in an hr than I did in the year of owning it.
After that, JB4, Meth, DP's, FMIC, Exhaust!
Good luck and be safe man!