Zwift is an popular online training app which allows riders to cycle on virtual routes with the potential to mimic the difficulty of the terrain. There are a number of How To videos here to begin your set up, one of which is embedded below.
In order to join the group rides, ensure you are set up ready to go and logged in at least 5 minutes prior to the start time. Select the correct “World” and click “Ride”. A few minutes before your ride a notification will appear telling you that your ride is about to start.