Yep, essentially, even if i had a few years of life to invest into this, i'd request a lot
more proof that the author of the thread would be anyhow helpful, and that a few other people would join. Either the author starts alone and produces a large portion of working code before calling for cooperation, or at least i'd expect to see a few years of experience in gamedev, ideally making simpler games from scratch, to consider cooperating.
It's so strict because either the project reaches some sort of completion, or i waste a few years for literally nothing. An empty github repo and a few books read wouldn't quite convince me or other people around.
Note how few real-time strategies were actually developed the way you propose. I'd recall 0 A.D. which is still in deep pre-alpha after 15+ years of development, with an impressing list of contributors 
. There's also a small community around the Spring engine. Also glest. Anything else?
That's why i stick to people who have already done a lot of work on this game and are still actively working on it. This way whatever i do, it's not wasted. Hence the advice above.
That said, i'm happy to see you enthusiastic. I guess you don't need a blessing to try to play around with the code and share what comes out of it. After all, the internet is about sharing rather than requesting.