I share your pain
@khun_diddy. From an accident many years ago I have a lazy right eye, tunnel vision (limited peripheral vision) and limited control/coordination of my left-side limbs. I have to twist and hold my head in a different manner when shaving my left side than my right side. I probably look like one of the Indian Rubber Men in the circus' of old. When I first started straight shaving I struggled big time but you learn methods that help you overcome the hurdles in your path. It just took me a little longer than most to become proficient. Straight shaving is addictive. I know you have the passion for wet shaving to push on
@khun_diddy. Try holding the razor flat against your cheek then slightly lift the spine to the correct angle and then commence your pass. You will "feel" the correct angle as you shave and you become increasingly more comfortable and confident with doing something so challenging.
Just do it
@khun_diddy, just do it. You will be able to succeed.