If anyones interested in Obsidian and daily journalling keep the initial ceremony low. Some people have sections for challenges, achievements, mood, emails, to-dos, etc. That'll be far too much cognitive load for anyone - keep it simple and very quickly you'll know whether you want to add or remove any of the daily ceremony.
I have a "Key tasks" where I include a mostly succinct breakdown of anything worth noting. I did this on Google Docs for 3 years before very recently moving to Obsidian and I wouldn't turn back. Tags and back links definitely help me jump between related thoughts and actions much more than grepping in a 50k+ words Google doc :)