Currently, I have to use several different apps to take my notes and go through the annoying process of sharing back and forth via Google Drive or some other convoluted method.

Please include PC compatibility for note-taking (not just viewing) and a cloud sync to avoid issues with transferring notes back and forth. See sites such as Canva that already do this. Honestly, sometimes I just use Canva for taking notes since at least I can control text formatting, grouping and locking, and cloud sync.