hello everyone

im fairly new to the german auto world. mostly been a japanesse auto kid. but found a great running 86 325i and figure id nab it. i know the potential these cars have but dont know to much about them. i had a 96 civic vtec before i brought the bmw, and was setting it up to run ciricut track and be a street car. would i be able to do the same with this 325i? dont wanna go over board with exterior but do want it looking nice and clean, but seeing one guy make round 600hp. overall aim is about 500hp. what do you all think? (and my civic was very clean not riced lol, jus figure id put that out there lol)