reworked from here, so feel free to use it as inspiration
No part of this was planned. But here you are, washed up on this distant planet, and you have no choice but to survive. There’s no way to send a message, and no one’s coming to save you. You’re just going to have to use whatever you can salvage from the wreck to make this barren place into a livable home.
Some groundwork to set the scene: Though its clear that this is not a familiar planet in the least, this planet is fairly Earth-like, so if you're not sure, yeah, that's grass, those are trees, and bugs are still gross. Feel free to establish any fun alien quirks you're into, though.
There is evidence of some kind of alien society, but it doesn't seem like anyone has been in this particular area in a while; so, ruins that can perhaps be taken advantage of as the basis of shelters, or primitive tools. Are these people still around? Do we have to be worried about what might have killed them off?
There wasn't so much a crash as some wacky time-space shenanigans happened and you and perhaps everything around you was scooped out of one area of space and deposited here. So you might have brought your bathtub with you, or the pizza you were eating, or something more useful if you like.
We might all be here by accident (??) and end up relying on each other to get by, but that doesn't mean we have to get along. Maybe you're a shithead and want to start your own colony over there somewhere. Good luck, asshole.
Time is meaningless, threads can take place at the moment of the transplant or well into established homelife, go where your whims take you.