Expedition: general discussions.

And finally, the reasons to go to a specific world.

In this regard, the approach of working for a specific organization would be good; it's not that difficult to come up with reasons for traveling to different worlds. The problem here is that, as in 1257 or Black Ice, it turns out to be a continuous storyline that you inevitably have to follow.

And also, the specific method of travel needs to be thought out and how it works.

Yes, I didn't think about that either. Super-powerful devices that tear through space are somehow too banal.