I only have a small Kubota B77 backhoe on my tractor. Digging stumps is an art that takes some skill. The larger the backhoe, the more forgiving it is for lack of skill and technique.
You'll get the hang of it after some practice. One thing I found really interesting when I bought my backhoe:
The first day I was really awkward with the controls. Once I slept for the night, it was like my mind programmed itself overnight and the next day was a whole different experience and I was much more efficient with the controls. Now, I don't even think of my actions, they just come naturally.
It gives credence to the old tip that before a big test in school, they always recommended you study right before bed.
I guess I'm the same way in my job. I'll work on a problem up to a point and then I know it's time to walk away. The next morning, I'll wake up with the solution and/or a course of action. Never fails. I guess my mind keeps working in my sleep.