A simple tool for schematic board wiring?

Question

Arduino

I am designing a device on STM, I have no experience (except for arduino).
There is a board with an MK (non-standard) and two dozen peripheral devices (GPS, etc.)
What tool will help me conveniently connect them, move them around the workspace, create the elements of their pictures themselves (arbitrary arrangement of pins on the boards), etc. ? Mounting will be hinged: components on their boards.
The main criterion is ease of development. This project is just a hobby and I don't want to go into it professionally.
But how will the decision change if I still want to go a little deeper?

Answer 1

splan, fritzing for watercolor and gouache.
sprint layout to draw the board with some hint of believability.
when using a normal cad-system - a project containing 2 dozen gps-level components and a custom board with stm - cannot be called a "simple" hobby and with superficial knowledge the output will be a bunch of feces or it will take an indefinite time. of the options you can use circuit maker, kicad, diptrace.