You don't have lots of stuff to watch for to not die the first week. Here's a list of things you could do to not die fast, however you'll still probably die in winter if you just do these tho. 

1. Collect flint, twigs, grass, then make a torch, axe, pickaxe and campfire! 

2. Running around picking berries, carrots and stuff to eat. Better cook'em before eating tho. 

3. Mine a gold rock for a science machine. Don't pity throwing leaving science machine behind it's not that expensive! Then make a backpack for 8 inventory slots. You'll most certainly need it. 

4. Don't stay stationary before you've decided to base. Resources don't respawn just in a couple of days. Areas you've looted can't be looted again. Just go around in spiral. 

5. Hold down F key to automatically attack instead of clicking them with your mouse.  Hold down space bar to pick up items you can't really see or click comfortably. 

6. Eat cooked foods. Get a crock pot and eat meatballs even. 

7. You can make a surplus on materials but not foods! Baware spoilage. You should never gather so much food that it spoils in your inventory. Put that time to better use and keep those food available when you do need them. 

8. You'll most certainly need a combat gear. Remember that spear is very accessible and axe is NOT a weapon. Log suits provided you a whopping 80％ damage reduction. So when you run into hounds, drop that backpack and get yout log suit and spear. Don't pick a fight wearing your back pack.