By your comments and even the settings options you make available now, it looks like you’ve got the spirit for offering choice.

I like the “speak your mind” in your note text box. Perhaps you could free up some head room by making that static at the bottom of the page and using 100% width, or adding a large floating button on a bottom corner that would then expand the box for note making.

That may allow you to focus on possible tabs…and to make content discovery the main focus.