Stick with it and don't resist the urge to give up on the left hand. I can't when pick my nose with my left, but can shave just as easily with both hands and a straight. Funny thing, I still can't use my left with a DE.
The neck, for me, took multiple reps and a lot of practice to get comfortable with. I have to say, though, there is an area under the chin and down on the right side that I could never get shaved closely and comfortably with a DE that straight razor shaving fixed entirely! And it was a place that, at first, I couldn't even get a straight blade to get through. It kept skipping. The hairs are especially dense and coarse there. I finally figured out an approach that worked, a sideways, "Gillette slide"-ish sweeping motion that moves kind of in the WTG direction. After the first couple of times I finally got a straight razor through that section I knew that open blade shaving had something to offer me.
