The one for +inv space, the regen one in fortitude, as well as farming, trader ones are good too, as you don't have other players to help you get stuff. Master chef lv 1 asap, (lv 2 is not worth it early game as most of the stuff you can make is worse than bacon and eggs that needs lv 1), 1st rule cardio I drop a point in the second I get my first point, then I get 3 str and the lv 2 in the inv carry capacity one. Intel u could get a bit later, just make sure to have 4 intel by lv 20, and a 5th skill point to get forge.
Getting a few levels in the perk that gives +headshot damage is nice. I choose melee, since most will want high str. Try to get a fireaxe and the stuff to repair it, you can repair iron/steel tools/weapons ands guns at level 1, you don't need to be able to craft them to repair them in a17. Hell I found a steel fireaxe 2 game hours into day 1. then bought some steel at the trader to fix it, I now have my default melee weapon, though it was only tier 1, so I need a better one to mod it later.
I focus more on crafting/survivng than damage dealing at first, as with a iron or steel fireaxe most early game enemies take 2-3 headshots to kill even without perks. It'll also insta knockdown non-fat zombies early game. Not sure if what I do is optimal, but its what I found works for me, your mileage may vary.