Obsidian is wonderful. I have folders with daily or weekly notes (and could do monthly or yearly too) similar to what you said. There are so many other features that I could use but haven't yet, because I got it working exactly how I need right now.
One example I use besides journaling is taking notes on YouTube videos. For example, with interviews of YouTubers who give a lot of advice. I can put them all in a folder and/or apply a tag to find them in the same place later.
The 2/3 companies already selling data is awful. ☹️