Board Game Arena

I think an interesting Nimmt variation might be to reverse the goal: it's a race to zero with the lowest score winning. Like take-me checkers or give-away chess. It could be tested in bga in Training mode, to see if it was fun enough to be worth adding (i.e., asking bga to add a 'race to zero' option by changing the victory determination).

But how does one gather a group of people to see if it is fun?

Posting about it is a good way. If you also open a group dedicated to that and advertise it in your post, then you might have players joining that. And also, then it's easier to ask everyone if they are free to play via the group chat