This python script is similar to my approach; the file then is used in obsidian.

I like the idea of adding the weather there! And of getting TODOS by parsing md files. And getting the calendar

Python really is the better thing to use for that, not bash. Sadly needs a computer to run.

Link from https://jamierubin.net/2021/04/01/my-obsidian-daily-notes-automation-script-is-now-available-on-github/

When looking for similar stuff stumbled upon https://forum.obsidian.md/t/slrvbs-journaling-setup/22346, an example of how deep can one go with obsidian templates only.