As everyone else here mentioned, start examining bushes. Collect rocks, sticks, and dead plants while you train survival so you can build a stone hammer, stone shovel, axe, cooking pot, fire drill, every tool you need for survival. After a bit you'll be in good shape and need more rocks for a charcoal kiln to supply a smoking rack. Once that's accomplished you're probably going to survive virtually forever, since you'll have figured out food, water, and shelter from absolutely nothing. Once that's all set up go build your clay kiln, make a clay crucible, build a rock forge and start setting up proper tools and decent metal equipment. Hunting knife, various medieval weapons, mechanics tools now open up and you can train mechanics up to build a deathmobile from scrap metal and helicopter crash sites.

Other suggestions include building a bow early to hunt, though a spear could work for fast characters. Swamps will contain cattails, which just require a mortar and pestle or quern to make flour, and give delicious cooked cattail stalks and mass plant fiber to boot. They'll also always have water, so you don't have to go looking too hard for puddles. If you're careful you can even use them for meat so long as you don't mind eating bugs.

I actually recommend learning innawoods before you play in cities because you'll figure out how to survive almost 100% of the time without as much chance of getting screwed by the RNG. If you know how to thrive innawoods from survival and fabrication 0 and building up from there, you'll appreciate anything that makes the process shorter as a mere shortcut, not a necessity worth risking your life over if you can't get it.