Just get in it and go. You're not fine grading for asphalt. A grader is like a wood planer, the more you go over it the better it gets. Big thing I see a lot of dozer operators do when they try a grader, is moving the mold board too much, and not angling it. The machine will do most of the work for you if you let it. One function I couldn't live without, is mold board curl, it changes the cut and flow of material over the road. If you were to have the machine on a perfect spot. If the bottom of the cutting edge was the same elevation as the bottom of the tires, and start to drive, as you came to a high spot, the machine would start cutting, if your MB was full, it would leave the material in the hole. I know it's over simplified, but if you can get that basic move down, you start to learn all the other stuff after. If your draw bar is set up right, and the circle, or point of rotation is level, you can rotate the MB with little adjustment, however, on some machines, your drawbar is not level, and as you rotate, the leading edge of the MB will drop, and the trailing edge will raise, so you have to compensate as you rotate. All comes with time.