After completing the intro you’ll get your own camp, with a fire to craft your items. The most easiest item to craft is meat you get from skinning animals. Note you can craft the same item over and over again and get progress torwards the achievement.
Simply go outside your camp on the horse or on foot and look around for animals to kill and skin. Tip that helps if your having trouble looking for small game animals is to use eagle eye by pressing
+
that will highlight animals in your field of view. Once your certain you have enough meat. Go to camp and sit by the fire by holding
to craft items. Sit there and cook all the meat you just harvested.
I pressed left on the d-pad and moved the camp to Hennigans Stead quite close to the rail tracks where I found rabbits, Pronghorns, wolfs etc and got the achievement done in around 20-30 mins. Possibly doesmt matter where you set camp up but I found that not many players venture around the bottom left of the map. So less hassle having to worry about fending off a posse of degenerates while your peacefully salvaging resources to survive.
Matallicafan459 Mentioned in the comments,
“It looks like the game resets your progress every session, so you will have to do it in one session”. So make sure you get this achievement done in one single session otherwise your progress may be reset.