All sounds like good advice.
So to confirm from the picture above.
Green. PTO drive both, front only, non rear only
Black turn knob. Diff locks and 4x4
1 > 6. Road/field gears
Orange L, H. Is this for field and road, or for much more?
Black arrow. Forward, neutral, Reverse?
What is the other lever for, and how does the L,H work with this if at all?