One-handed on the DE should be no problem. I started on the DE before for a few years before switching to SR. Recently I've been shaving more with the DE to save time during work days.
Aside from the advice provided by others, I'd say:
(1) Stretch your sideburn area upwards when shaving.
(2) Shave using short strokes.
(3) Don't be afraid to shave against or across the grain.
Have a speedy recovery!