this will sound bad. Shaving is a simple thing relax, slow down and it will be over soon. Seriously, worrying about shaving perfectly leads to mistakes. providing that the edge is sharp and well stropped the angle needs to be low and the pressure light.

As for how often to shave no more than once a day. If you are only doing a WTG pass daily shaving should be a breeze. Also if you have any cuts on your face let them heal up before using your straight, my experience is that if you don't you will just open them up again when the blade passes that area.

i sometimes close my eyes and shave WTG in preparation for old age or if i am not wearing my glasses, darkness is better than seeing the very blurry reflection in the mirror.

jim