One of the most common questions people ask about Obsidian is how they should set it up. The standard answer: depends on what you want to do, customize it to your workflow, and just start taking notes and let the structure emerge.
While these statements bear some truth, you can leverage some common personal knowledge management patterns to accelerate your set-up. Based on your objective, there are some well-known and well-worn starting points:
https://medium.com/obsidian-observer/get-started-with-obsidian-when-you-dont-know-what-you-re-doing-3c6e19ea5dc5
