I hope Lemmy will become this. Here is my strategy:

1. Create a Lemmy community (for example !automotive@discuss.tchncs.de).
2. Submit something every few days. Not much quality control. Quantity over quality for now.
3. Hope for a community to form.

Sounds like you would prefer a peer2peer approach instead of federation? A few years ago, I wrote up why I don’t belief in p2p. In short: It’s too costly and too complex.