My note taking system is a single "donelist.txt" that sits in a GDrive/onedrive/xdrive on my machine. Entries are:

9.11.22

scrum

working on stry1234

meeting X

- do a thing

lunch

created PR for stry1234

meeting Y

8.11.22

scrum

working on def4321

lunch

created PR def4321

meeting Z

meeting A

...

This is good enough for me although I'm still figuring out how to plan ahead better. Maybe I should write down how I expect the week to go, goals and schedule, on Monday and update from there.