I unfortunately agree a bit with Tobi, even if I'll not go that far.
I understand this is frustrating, but the community is rather small and not everything is always well documented.
We can give advices on ponctual things, but we (me, at least

) don't know everything, and can't lead a whole project for you
I repeat my advice : you should consider starting a smaller project with easiest goals and consider to return towards your initial project as your knowledge about the game improve.
I just take my own example.
First, I did maps ; I quickly added flags, victory points, prestige points, etc... and I did 1v1 against myself on them (don't laught, fight against ourselves it's a good way to understand how our moves can be lame from the other point of view

). Like you do, currently

On this basis, I decided to try to simulate a computer ennemy, by putting different AI stance to each units.
It was good enough, and I decided to work on my WWIII project, with scenarios that I will release and that I want better and better as I progress in my understanding of the game.
Firstly, they were just map packs : the scenarios were not linked between them ; but I learned how to do campaigns after 3 or 4 of them.
During my 4rd campaign, I decided to try to make modifications to the equipment file ; around my 6th to modify unit icons ; to make localizations in different languages (learned, but finally not used that much

) ; soon after to add different soundtracks ; etc etc...
Now, I'm considering to add heroes for nations that had none ; and on the longer run to create new armies and units from scratch instead of using existing assets, like you try to do.
I still don't know exactly how to do it, but I start to know the game enough to understand how I could potentially do it.
Even if it is far, I can consider it because I advanced step by step ; and at each step, I had to find a solution, forcing me to put my hands in the motor and understand how it is running
I had problems to add images when I started ; now I consider it a very basic thing to do and could do it in 3 minutes with a chronometer in hand and without thinking about it at all
You could also look the first map pack Tobi's created : they were enjoyable, but far to be perfect.
1 year later ? Ha ! he is doing full campaigns including scenarios with complex scripts, interesting gameplay choices, new unique units, one of these campaigns even have an army of robots he created himself ! And should I talk again about his "Adventures in Afghanistan" ?
He also made a long road since his start here ! As he say, there are no shortcut.
Your two maps looks really great, that's a good start.
I guess it is not what you want to read, but you could (should?) improve on this basis. I don't insist about it without any reason, I think it will help you to progress with how the game work.
What about doing smaller maps and start to put units on them ?