Wilderness survival in this game is ridiculously easy.
Scavenge bushes until you get survival high enough to do things.
Make s tone knife from the things you got scavenging.
Smash small trees for sticks and bushes for withered plants and use those things to grind your fabrication up a bit.
Make fire drill and stone cookware from materials found above.
The only difficult thing is water - making a makeshift funnel requires some luck with finding bottles.
Need rags? Ok, this takes a long time, but it’s easy: you can make rags from sinew or plant fiber (available from cattails and several scavengeable plants).
As long as you avoid giant insects and make some defenses to keep out the moose/bears/wolves (keeping fire around also helps), wilderness survival is crazy easy.