How do I go about setting up Audition so it can record Discord sessions?

Was just curious how I go about doing this.  Can't seem to figure this out.

Went and used the default "podcast" template.  Can't seem to get the "Interview" to record the sound coming through my headset or the the sound coming from discord.

From tutorials I've seen I went and made sure I had "Stereo Mix" enabled in my computer settings, but from there can't figure out what to do next.

Any help would be appreciated.  Possibly pointing me at a up to date tutorial as most I've been finding are from Audition 3 it seems.