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?

>>5 prototyping
what this faggot said. also, use oop (for the prototyping). do and understand as many related tutorials as you can find, and by the time you are through you will have a lot of base components that should be very apparently and readily adaptable into game components. then prototype like >>5 said, with simple cool things (mouse input, units moving, whatever you feel like at the moment and goes towards the end goal). and then eventually you have the product.