Obsidian doesn’t have a print option at the moment. The feature request is here:
You have a few options:
Copy from Reading view and paste. If that’s acceptable, great!
export a PDF and print that.
Use another program (Typora, MarkText, etc.) to open the note and print it from there.
Pandoc should be fine, but that needs to be installed itself as well as any Obsidian plugins that use it: Pandoc - Installing pandoc (you may have done this).