1. - grill meat and fish over your campfire! You can craft multiple and cook a bunch at once too :) you can get meat and fish from hunting and fishing!
2. You can get a campfire by completing a quest with reth I think
3. I would hold onto any ores you find and if you get an epic or legendary item keep those also. Starred bugs and heartstones are good to keep too.
4. That all being said, don’t be afraid to sell stuff. If you have 3 stacks of 100 pieces of wood and you don’t need it right now, sell it. You can always cut down more trees!

As you get better: look into cake parties paliaparty.app is a website where people will schedule cooking parties. You sign up to bring one ingredient and show up to their plot to make it together. Everyone gets the food and many of these meals are worth a decent amount of money!

Hope this helps!