Feeling that I'm not good enough to do what I have in mind to be tactful. I'm also not trained as a painter. I want to do a series of everyday scenes in monochrome. Can I use the same color effectively to convey value? Will the detailing look like shit? Will I get it done and know it's unsuccessful anyway? Just a laundry list of anxieties that exist in my head without form but I typed a couple out for you.
Don’t mind the output, the process is the opportunity here. Be ok with the possibility that it will look like shit, or worse, just a bit shitty. You probably have something in your mind’s eye, but I would try not to think of it as a destination, just as a suggestion. I am not a trained painter. I consider myself good, but not yet great. My advice would be to paint the light. Resist objects and form, just paint the light.