Yes, you should slow it down and work your way up. This will get your eye- hand is sync with your driving speed.

The M12 gives you control on everything. Some settings are better off controlled in the ESC and some in the radio.

Soon you will be able to see the over and understeer and start tuning the shocks. When the servo is too fast you are only focus on keeping the car straight and cannot see anything else.

Visualize being in the car. When you make a U turn the steering wheel rotates a few times and when you release it you lightly grab on to it to slow down the rotation until you exit the turn.

Make you radio mimic these setting and you will get through the apex easier.

Inobu