I Got Sent to Another World, but It’s in the Mountains. In Reaction, I Choose Comfort Over Strength - Chapter 2

I still don’t understand his salt problem.
FFS! He lived on an island with the sea in walking distance!
Sure, he was barely able to feed himself and getting salt would take an extra day of work or two.

How to get salt with minimum work:

1. Going to the sea
2. Build* a minimal shelter there (about 1 day)
3. Build a salt “pan”*² (doesn’t have to be that big, so about another day)
4. Build a lean-to that prevents rain getting into the pan (one more day)
5. Wait or build a second setup.

Why do you want a second setup? Harvesting salt out of the pan can take a while. You have to carefully scrape the new salt off.
Waiting for the water to fully evaporate can take weeks.

And, yes, there was a time skip, and he was there about 3 to 6 months, I guess.

Footnotes:
*= Is is build or built? I always mix them up.
*²= A salt pan is basically a flat hole in the ground. Where fill seawater and let it evaporate. However you need to compact the ground to minimise sand in your salt. And the salt from the first few uses also help to stick the sand together and increases water tightness. Having access to clay and build it out of that is a plus, but not necessary.