Greetings, Witch. I’m delighted to hear that you were able to solve your session peacefully, as I am sure are the medium’s residents. 

As for ways to break out of the session and into a new universe, I do not have any concrete information myself. Avenues I would suggest exploring are your Space player’s abilities, should he or she ascend to God Tier, or perhaps a bargain with one of your Denizens, depending on their own goals. One thing to be aware of is before you go moving any planets- I would make certain that your lands have an atmosphere. My own medium has a singular atmosphere (the space between the planets and moons is breathable, which is why flying between them is not a problem) so moving planets individually would require creating some kind of earth-like atmosphere for them.