If you don't intend to do it in the legit way (which is pretty easy thanks to the Cross play function - you can find plenty of players right now after release) grab a boosting partner, create an online lobby (preferably invite only or just for friends) pick Most Wanted game mode and simply catch your buddy 10 times while you are playing as a cop. You can choose between a Cop or a Racer any time in the lobby with pressing the
button. (In case if you wanna trade wins race by race.)