Problem with developing the base code of the RTS game

Hello everyone, I’m creating an RTS game similar to Mushroom Wars. But I encountered a multitasking problem in the form of writing code for this game.
I can’t figure out how to make units appear from a building and go to the right point to capture another building. I have very strong problems with programming, so I can’t write this code, no matter how hard I try (for more than 3 years).


Image straight from my game