Practice, Practice, Practice. Find roads that you feel comfortable on and practice your driving and speed at the right limit. Keep on practicing until you get more comfortable and can fully control your vehicle. I assume that where you live has speed guide limits for bends in the roads. Stick to those guide lines, or stay under them until you know you have control of your vehicle.

If you feel sleepy don't drive. If you are drug affected don't drive. If you have any alcohol in your body don't drive.

Before a learner driver in Australia get to be tested they have to log 200 hours with a fully licensed driver in all kinds of weather conditions and during the day and night.

Good Luck.