Dear Protector!
The idea is sound. But there are some questions.
Firstly, why only RPG maps? It's important to understand that they offer little practical benefit. I understand that it’s interesting and engaging. I enjoy them myself ;) You can spend a lot of time on such maps. If they will be made solely for this purpose, then there is nothing wrong with it in principle. However, along with this, you can create online and offline maps (but here, naturally, experience playing in tournaments on well-known popular maps is needed, but innovation is welcome). Who knows, maybe it will be possible to hold them at some championship or tournament. Obviously, RPG maps lose out in every respect in this regard. But again, I am not saying that they should not be created! ;) And a tournament on an RPG map, IMHO, is not worth it! Because the very goal of such a tournament will not be clear. So, my suggestion: include online and offline maps in the development process.
Secondly, one scripter is not enough. From my own experience, I know that writing a more or less complex script takes a considerable amount of time (this will especially apply to RPG maps, which always teem with scripts of varying complexity), as I always try to check its functionality immediately after writing it. Although I do not deny the presence of professionals on the forum who have everything automated. Therefore, several scripters are needed. This will reduce the overall creation time of the map.

Next, why isn't there a position for an artist or decorator? :D
If we talk seriously, personally, I don’t want to play on empty maps. Many map makers sin by doing this, leaving areas of land unfilled when you could put a tree or, for example, a fiery rift in that place. It is clear that this does not offer any practical benefit, but playing becomes much more enjoyable!!! Just so you know. :)

Regarding testers, it's more complicated. If we take online maps, these should really be game professionals! Because only they can notice all the flaws of the map in terms of the player's progress, for example. With RPG maps, it's easier. Here, enthusiasm, attention and patience are simply needed.

Now about myself. :)
Personally, I am ready to help in every way possible, since I already have experience. I can work on scripts and decorations :D. Unfortunately, I probably won't be able to test effectively. And also, I'm no good as a screenwriter :D
For those interested, here is my small track record: /forum/section/167/

In general, Protector, 5 points for your initiative!!! I think everything will work out! :smile12:
Sincerely, L@R$$ON.