see now this is where I could totally use a recommendation. I dont know what a capacitor is, what a resistor is or what ohm's law is. I would expect there is atleast one book out there that can teach even an absolutely noob like me how to build a microcontroller circuit board from scratch. I mean not on page 1 obviously but maybe on page 1037?
The way to do this back in the day was to read application notes (in real books ;) that the chip vendors would print and give you for free). You would have everything spelled out in example circuits that you could put together yourself. I'm not sure where things stand today.