Open or make a Unity Project
Add the below packages in the Package Manager
onAirXR Unity XR Plugin
https://github.com/ClickedInc/onairxr-server-unity-xr-plugin
XR Interaction Toolkit
Check “onAirXR” in XR Plug-in Management of Project Settings.

Add onAirXR Playground package as shown below in the Package Manager.
Click “+” → “Add package from tarball…”

Select onAirXR Playground package tarball : com.onairxr.playground-3.1.2.tgz
Import “Starter Assets” sample from onAirXR Playground package.

Create “Playground Origin (XR Origin)” from the menu.

In XR Origin > Playground > AXRPlayground component,
Set Avatar to “SampleAvatarSelector.prefab” in Starter Assets.

Play the editor, then you can connect using onAirXR Client App at the address below.
Address : [PC’s IP address]:9090
Please refer to the link below for details on how to use onAirXR Client App.