I don’t know that it’s really a “build”, but I’ll show you what I like to do.
Stats:
Strength: 14
Dexterity: 8 (I feel its benefits are spread too thinly to be worth it)
Intelligence: 14
Perception: 10
Positive Traits:
Fleet-footed or Quick. A lot of the other ones have cool effects, but are painfully expensive. You might try Light Step+Inconspicuous instead though, or try something with Robust Genetics and hope for roadrunner.
Negative Traits:
Heavy Sleeper (situationally a benefit. It sucks being safe, but being unable to sleep because of a wolf spider lurking outside)
Glass Jaw (The times that damage killed me, it was always the torso. Also, you can encumber your head with no penalty. Headgear is plentiful)
Addictive Personality (I’ve rarely had to use drugs, and by the time I have them, I also have a shelter to sweat out withdrawal)
Truth Teller and Ugly (Duh)
And Either:
Trigger Happy (full autos eat too much ammo for my tastes anyway)
or Wool Allergy and Weak Stomach (in which case you might want to save your sinews and train tailoring to make fur equipment. Also, don’t eat rotten things.)
Skills:
Dodge. If you want to tweak, archery and mechanics (and maybe survival) are the other things you’ll hurt for in the beginning, but dodge is a very safe investment.
General strategy: Check the evac shelter for meds or a weapon. Rush the town (I play without static spawn) and assess that the starting town includes a gas station, tools to weld with, batteries to do it with (seeing an electronics store on the map is usually sufficient) and at least an unfinished chassis to do it on. Also watch for reading material - Archery for Kids and Under the Hood are most desirable. If you can’t train archery this way, you’ll have to find and disarm crossbow traps or settle for throwing.
Only scout at first. Keep your torso encumbrance at zero so you can fight, and leave copious loot notes on your map. Weapon-wise, a crowbar is ideal since it pulls double duty, but any decent melee weapon is fine. Eat/drink as you go and resist the urge to hoard anything that takes up volume. You can generally deal with zeds by simply choosing not to engage, but in a pinch, use terrain to your advantage. Hit them while they are bottlenecked in a broken window or are struggling through bushes, monkeybars, wreckage…
When you are satisfied that the town can get you started, egress to an evac shelter and read/sleep (edit: don’t sleep in town. Even when you’ve taken considerable precautions, you often wake up with a smoker zombie up your flush pipe). Spend experience making arrows (or throwing rocks if you aren’t doing archery) and butchering corpses, so you get stable food and sinew income from wild animals (and can protect yourself decently). Then train mechanics until you can add a muffler to the chassis you found.
From there… do what you like. The character is pretty close to a blank slate and will quickly learn whatever you want. Personally I go heavy with archery, wear multiple backpacks and start hunting bionics, but… that’s just me. 
