ah oops!! Thanks for clarifying, I wasn't sure between the hermit and the lockdown which you meant and guessed wrong!
I've just started the desert island challenge. First thoughts:
You can't fish as you need to get the rod from Willy
No ore so far. It's possible I might get some from artefact spots, but I've had none from any of the rocks I can smash
Obviously you can't upgrade your tools
Nor have animals
Or buy seeds
I've used all the wild seeds and I haven't had any more. Not had dandelion or daffodil spawn on my farm so cannot make spring seeds, even though I have the recipe.
I'm not sure what else to do now.