Use a DM with yourself to record a practice volley before sending the real thing, talk things out with yourself to see how it sounds later, create a video/audio journal with daily recordings of yourself. There are lots of ways to use a conversation with yourself in Volley!
1. Go to your Direct Messages (your profile picture or initials in the top-left corner of the app) and press the blue plus button.
2. Select "New Group DM"
2. Don't invite anyone (press skip)
That's it! You could rename your DM to something like "Talking to Myself" or "Volley Journal" or whatever will help you be able to find this DM later.
Pro Tip: Forward memorable volleys to this DM for safe keeping