I've looked around and found about 3 tutorials for tic-80. And about the only thing that could make tic-80 better is more tutorials. So where would be the best place to find/post tutorials? I'm hoping to write some stuff for beginner.

It would be great, I'm going to create tutorials section on the TIC website in the future.

For now you can post it on the Wiki https://github.com/nesbox/tic.computer/wiki/tutorials and we'll move them to the official website later.

Thanks.