I am doing this as a hobby, If I break stuff further than what it is already.... Oh well, it's my money, my loss! As long as I have a schematic, I should be fine with supplying voltage and current to the boards. I'm not going to go add 120v to a 24v circuit haha, and just start guessing at things. I do have common sense.
I don't have time to go take a "course" I've taken enough college courses in my life lol
I am not a newbie when it comes to electricity, just when it comes to "electronics". I have experience with commercial and residential power distribution and commercial kitchen appliance repair. As long as I have a service manual and/or schematic I will be fine.