Thanks for the feedback! I definitely get what you mean, and seeing the difference of the edited part versus original does help. I think this was also a bit too large of a piece, and I should practice the mentioned issues on smaller stuff.

Thanks! Yeah, I tried to add some, like on the brown tones. Thanks for the suggestion!

Yeah, rather than looking blurry I felt like I just made things look thicker and jaggier in my case though haha. I feel like I struggle in choosing the "AA color".

In the piece you linked I think breaking up the lineart as a form of AA is really interesting but I feel I don't have enough experience/confidence yet (Need to work on palettes and values) for that technique. But I'll continue to look at guides and other peoples pieces to learn.

Thank you!