I have something similar, with the folder syncing to google drive, you could enc...

I have something similar, with the folder syncing to google drive, you could encrypt if you want to before hand but I never got to it, I separate one file per month.

  alias journal="vim ~/workspace/google-drive/journal/$(date "+%Y-%m")"

Then in vim I have this mapping, by pressing F2 it opens a new line at the end of the file so you can just start typing. I add goals to the beggining of the week with the F3 map.

  nnoremap <F2> Go<NL><Esc>i<Esc>"=strftime("\%A, \%Y-\%m-\%d \%H:\%M:\%S")<CR>po    - 
  nnoremap <F3> Go<NL><NL><Esc>iWeek <Esc>"=strftime("\%V ")<CR>p<Esc>i goals:<CR>    -

Monday -> Press F3 -> like a bujo, review what is still relevant and move to next week or drop it.

  Week 10 goals:
      - [ ] check connectivity with service x, splunk and service Y, from new environment
      - [ ] xxxx

Then whenever I will change context in my mind I just go back to the open buffer and press F2. I normally start my day looking at what happened over the other remote branches, and update my weekly goals task list

  Thursday, 2020-07-09 08:25:52
      - emails / slack

  Thursday, 2020-07-09 08:36:13
      - support x person

  Thursday, 2020-07-09 10:00:00
      - dog break

  Thursday, 2020-07-09 10:00:00
      - HN

Then at then end of the year I create a folder `archive/201X/` and move all the files under it.

I had a calendar event reminding me to review what happened over the week on Friday afternoon, but that is just lying to myself. I got to do once or twice over the last couple of years, that is something I need to improve on which is the whole point of article, review it while it is fresh and learn from it.

edit: code format