If you know how to use a box blade... stop reading now.
If not, here a little advise: to cut into the dirt and fill the box, you'll want to shorten the top link so the front blade hits the dirt before the rear blade does. The rear blade is good for smoothing the surface out, you need to extend the top link so that the rear blade needs to touch the ground first.
It doesn't look like you need side to side adjustments.... but If you ever need to cut along a side hill, you'll want to tilt the blade with the 3ph. It helps to place a 4x4 to take weight off the screw, you'll need to raise and lower back to the 4x4 to reset the pressure on the screw... Anyway, practice, practice and practice more... good luck.
Hydraulic top and tilt makes this SO much easier!!! And shortens the learning curve...