I've tried at various points to do dailies with different formats and such, but I'm apparently a boring person because I don't have much to write about on a daily basis. I don't like using Obsidian for really personal-ish stuff like journaling because it's all plain-text and I haven't bothered to encrypt everything. I do use it for taking notes or writing out notes on personal projects I'm working on or new concepts I come across or just general things I want to remember (things I wouldn't care if somebody stumbled across it). Daily sort of "What did I do this day" notes are kind of weird to me, since nothing of note happens most days and I'm not anticipating being called into court to recount what happened.
I picked up one thing from Nick Milo's Ideaverse starter vault (or Linking Your Thinking or whatever it's called now), it's the idea of "Efforts". It's essentially another way of saying "Projects", but maybe less formal and encapsulates anything and everything I might be working on, dealing with, or putting effort into. If I have to write a paper, brainstorm something, car maintenance, an ongoing responsibility, something needs repaired, I have a dream project, or whatever, I create an effort note and tag it as either Hot, Ongoing, Simmering, or Sleeping, depending on what's going on with it at the moment. Then I use Dataview tables to sort them on my home note.