We don't need squishy lifeforms anyway... we can use ROBOTS. Wait, would robots work here? If not, we can always make some eldritch abominations. Those things are pretty durable, I think.
And if all else fails, we have the holes. So many, many holes. So long as we're careful about it and don't get sucked in, we should be able to spread our name to countless universes. Even if that level of believer only nets us 1 belief each. I wonder... can robots spread the glorious name of Organis through the infinite cosmos? If so, then hell yeah.
Of course, having to make each robot can wear one's belief out. Perhaps there is something else we can create? Something that reproduces or is really cheap to make. Hmm... if we can make a robot, then we should be able to make a bubble city filled with oxygen, artificial gravity, eldritch abominations, and fluffy bunnies, among other necessities. Good thing this place offers a source of light. It's probably not the sort of light compatible with normal plants, so we'll have to give our followers special crops. Preferably the kind that grows eyeballs.
Edit: In case it's not clear, I'm suggesting that the eldritch abominations be our followers. I assume abominations can breed. If not, let the fluffy bunnies follow. Or if we're especially mad, let both worship us.
Double edit: For an extra layer of awesome, make the bubble city also a robot.