Hi, just started using Joplin recently and I’m really enjoying it so far.
I have one suggestion in terms of aesthetics. Personally I think little icons next to each note, folder or sub folder look really good, and do actually help a little bit visually navigating around.
For example if you look at the notion app, they let you choose icons and I think helps it look really polished. And also on the Cherry Tree app the different coloured cherries on each sub-level look good too.
If you do this, especially when putting an emoji at the start of a title, make sure there is a space between the emoji and the word of the title otherwise the word becomes unsearchable. (Unless you include the emoji in the search term)