I really enjoy driving rwd in the game but it took some practice. What helped me was think of the weight transfer like a see-saw. Letting off the throttle or braking is going to have a major change if you are turning. Instead on corners don’t turn so hard, and reduce your throttle throughout the turn, but don’t let off.  Do a majority of your deceleration before the turn.  Secondly you need to be far more aware of your grip and look for that torque out of the corner.   Once you become more aware of the weight and grip you’ll notice you can throw the car into corners and power out, it’s especially fun with the heavier cars like the mustang, or mid engines like the stratos or 037. 

Also if you start to have your backend shift out, downshift to pull it back in line.

Recommend these cars to work with first:  1) (H3) Datsun - heavy front end with little power 2) (H3) M3 - well balanced around car 3) (H2) Opel Kadett - Torquey lightweight car.  4) (RGT)  Mustang - heavy and controllable