how to create a display filter to ONLY list devices using my wifi

edit

If you can find your bssid, then a simple filter would be

wlan.bssid == <your bssid>

This assumes that you only have one SSID; if you multiple SSIDs and or multiple APs, we would need additional filter items.

To find your bssid, see if you can find a beacon that has your SSID name (assuming you are not hiding it, which provides little practical security improvement). The WLAN header would have the bssid that you need.