I'm similar, but with vimwiki. <leader>-w-<leader>-w will open an entry for today's date, so for me ~/vimwiki/diary/2020-02-08.md. `<leader>-w i` will show a list of all entries. Pretty convenient stuff. I have mine start with a template as well, with a few common headers.

I do this too but this article makes me think that it may be better if everything u was one file folding avoids visual clutter anyway