I just want to recommend https://jrnl.sh/ which is a neat little terminal tool for keeping journals. I am sure most here could built it them-self over the weekend, but why reinvent the wheel. It works great with tags, dates (both displaying journal entries from date or date ranges and making an entry for a date or a time "yesterday"). It also support encryption and has a wide range of export options.

Funnily enough I actually love notebooks, but I cannot for the death of me keep a neat and nice design when keeping notes using a physical notebook, which means that I loose all motivation. However, having a minimalist tool like jrnl helps me to actually write, not just collect blank notebooks.