At Launch, so in a fresh vanilla game?
That’s what you mean by the title?
Fiber (Grass) “Plain clothes” is armor nr 1 i would say.
The game sees it as armor.
Complete it with wooden or bone shield.
Then gradually level up using again armor from the tier you are in.
That’s what the game intended i think.
All other armors depend on your chosen path.
there is no point for cloth armor it is worthless might as well go for shaman armor it only requires lether and you get for a complete set with +5 str