Thanks for taking the time to write a comprehensive report - that helps.
In order to ride any event, the key menu is the Events menu that is visible from the main page of the RGT app. At the top of the screen, there are four text menu items: Menu, Just Ride, Events, Workouts. The Menu is for general configuration of stuff, Just ride is the way to ride on one of publicly available ‘Real Roads’, Events is how to look for upcoming events, and Workouts is… for workouts (and I rarely touch that so don’t know much about it!).
If it perhaps not as intuitive as it could be but when a red notification banner for an upcoming event shows on the homepage, you can click the “View” button to jump to the event page for that ride. The alternative is to click on the Events option in the top menu bar and then select “Registered” in the selection beside “Your Events” on the left hand side. I have artistically and elegantly illustrated this in the screenshot below.
You can the select the relevant event. Once the RGT server is ready to let you join the event then you can click the Ride now button and join the event.
The overview from ~2:03 onwards in this video might be useful in case my description is not clear: Magic Roads - YouTube
Once you’ve found your way around the menus a couple of times then hopefully it will all feel a bit easier.
The second key issue - and personally I find this aspect of RGT bit annoying - is that it doesn’t seem to pick up the sensors (turbo, heart rate, etc) without you opening up the sensors menu once you have joined an event. So, as soon as you join an event, you need to select the Menu option (bottom left), select Sensors, and then check that power etc is being registered. (You can also load the sensors menu before you join an event if you want by using the Menu option (top left) and the choosing Sensors).
The first time you use RGT, you may need to check that the sensors are toggled on (see this video for more info Connecting your equipment on Wahoo RGT - YouTube) but once you have done that once, it seems that all you need to do is load the sensors screen and then RGT will ‘wake up’ and look for the sensors you previously had connected. I find this a little counter-intuitive but now I am in the habit of loading the sensors screen as soon as I join an event, it works smoothly for me.
I hope that helps. Feel free to ping me if you have other questions.
Edit: One thing I forgot to mention: The ‘Equipment’ menu option is just for changing the in-game equipment your avatar uses (bike, helmet, shades, etc). NB: The bike makes no difference to performance - it is purely cosmetic.