In options, change starting game time to 5 AM. it will be dark a bit at first but gives you more daylight to explore. Wander far and wide outside. stay out of town. your goal is to look primarily for corpses, but mark trap locations. Sometimes these locations have items. your primary goal is to find some bottled water and some clothing with pockets. everything else is secondary. the farther you wander day #1 the higher the likelihood of finding stuff. I can usually find a few sets of corpses and enough water to get me through a day or two.
early game… only eat strawberries, blueberries, and applies. they contain a small amount of water. food is not the issue early, its water. so pick up and eat. dont bother carrying. there are plenty to be found.
always carry 3 rocks with you. so if you run into something you can atleast do 3 rock throws to damage. throw rocks at forest animals and butcher to train survival and throwing. survival at 2 is critical for making a stone pot to purify water.
these are the keys for Day 1.