Note Specific Background Image

What I’m trying to do

I want to be able to add a background image to just one note in Obsidian.

Things I have tried

The only background image plugin I could find just added the image to all notes. I also found this page but I’m very new to Obsidian and don’t have much experience with CSS so I couldn’t figure out what to do.

Could anyone explain (step by step) how to implement the fix in the forum post above, or a simpler way of implementing note specific background images?

@STENZER - how did you specify which image to use in your code, and does it work by just typing [[BackgroundImage##bgimg]] in your note? Whenever I try this I just get a link to a new note.

When I try to implement it, it doesn’t recognise it
image