I do a fair bit of grading with my RC-30. It has four torsion axles and the suspension talks to my Butt. You have to feel what you are doing, not see.... Some people come by it naturally, I may be better than the next guy, blindfolded. One tip I CAN share with you, is the time of day. I prefer early or late evenings, the low angle of the sun will cast shadows. On my own land in the country where noise isn't an issue, I wait until evening, and finish under the lights of the machine....
If you have time, you will get better, there isn't much you can glean from talking with others. You may need severe angle to scrape backwards, you might need to dig in forward, just depends on how much is out of whack. Sometimes it does make a bit of difference to keep a half bucket full when working it down to "flatness"
Avoid "Just one more Pass" and don't be in a hurry, If it can sit overnight, and you can enjoy a cold one while you meditate on the work already done, walking and staring at it, you get a better result. Being in a hurry will frustrate you and you will tear up good work.