Welcome to SRP. I have an angular face/neck as well. It took me a few weeks to begin to feel comfortable manipulating the razor. I shave with my right hand and I have learned to stretch the skin to overcome the nooks and crannies. I keep a towel hanging near enough to reach to dry the fingers of my left hand if necessary when stretching.

I usually do one pass down followed by rinse, re-lather and another pass up. If you are having difficulty with the down pass I suspect you need a sharper razor. You might consider buying another shave ready razor for a backup and then send your Dovo out to one of the forum's honemiester. Best of luck with it.