Mate before you do any thing, if you cant handle it these are your main issues.
1. Dont go for CH tires, you'll eat **** if you cant handle 1000hp, try CS or SH, you'll find less sliding but still able to smash it round corners.
2. Lower the power back to about 700hp and work your way up, I never did this I like the challenge of the ACR sideways, It may help you.
3. **** the camber right off, it fights to keep it strait round corners.
4. You really need to 'tap' the throttle with this car, and dont rely on the e-brake to get you sideways It's unnecesery with 1000hp.
5. Put the gears max speed to about 350ish, you'll then find you slay 3rd around most corners and 4 for longer ones, use 1st and 2nd just for sick powerskids.
Hopefully this might help you out, if you have anymore questions about the ACR just ask mate.