Howdy Michael!
It's a thriller to get your question. Hope you're well.
First you want to create a discussion.
How do I create a discussion as an instructor?
Make sure the discussion is published.
Once you've done that, you can make "Discussions" visible/enabled through Settings/Navigation,
How do I manage Course Navigation links?
or you can place the discussion in a Module.
https://community.canvaslms.com/docs/DOC-12689-415241427
Let us know if that helps,
Sky V.
