I have at times had really large problems with focus, have implemented something very similar (markdown based "todournal". See https://rillabs.com/posts/todourn

I have at times had really large problems with focus, have implemented something very similar (markdown based "todournal". See https://rillabs.com/posts/todournal https://rillabs.com/posts/todournal and https://github.com/samuell/mdnote https://github.com/samuell/mdnote), as well as removed practically all notifications from my phone, and it has worked wonders consistently over the last couple of years.