Not to be rude, but you need to hone your skills in Danmakufu first before even attempting a fangame in it. The fact that you haven't tried the engine yet is off putting for anyone wanting to work with you in it. Why should anyone partner up with a person in using a scripting engine when the partner has no skill in it.
When group projects are concerned, its less about friendships and meeting new people, its more about working together to get the project done. Everyone contributes an equal share whatever that may be.
In short, just pick up the engine, get used to the framework and general setup and then come back with plans for a new game. Also, when pitching the idea of a game, no one will come to you just because you said, "Hey I want someone to collab on a game with me". Show evidence of what the game is, what its about, and what you need from those who will be participating.