Hey! Really glad you're enjoying the game so far. Don't worry about donations, it's okay, playing the game and sharing it about with your friends is already doing a lot for the community.
To cook meat you may place a cooking station on top of a campfire, then place raw meat in your toolbar, aim at it and press the corresponding key (1-7)
I personally agree as far as the spear and the bow projectiles are concerned, they fall down weirdly.
Make sure to join our Discord, it's free and the best place to stay up to date on development and people to play with: https://discord.gg/Gc4z47m
Akitake - Beta tester, Subreddit Manager, Discord Moderator