Installing Arthur on your Meta Quest VR headset is a really easy process that can be done in only a couple of steps.
1. Turn on your Meta Quest VR headset (if you need help with the first steps, read steps 1-4 here).
2. Press the Home Button 
on your right controller to bring up the universal menu.
3. Click on the Store icon 
4. Type "Arthur" in the search bar and click on "Go" on your keyboard
5. When you see the Arthur App, click on it. Click on Install to download and install it.
The download process has started! You need to wait a couple of minutes until the app is installed and after that, you can launch the Arthur application.
Here's a short tutorial video explaining the process:
To learn how you can join your first VR meeting, read on here: How to join the 1st meeting in VR as a registered user?