how do I code RTS game?

ok so I want to code my own RTS game like Starcraft or AoE or some other ancient 2D RTS.

I know C/C++ (although I suck at understanding OOP so I will basically just code it in C).  And I have a lot of coding experience at making random shit but have never successfully finished a decent project (mostly from lack of patience but also I suck at structuring my programs correctly so they eventually become hard to manage).

So, how do I learned to stop sucking and figure out how to code something like this properly?

>>1
If you're going to "basically" code in C, just code in C. Safer to forget you ever heard of anything called Sepples.

With that said, don't write something like this in C. It will just be a headache you don't need.

Also start with a simple prototype that exhibits one facet of the desired behaviour, such as little guys that can be instructed to walk to a place or shoot.