In both the documentation and the plugin itself, there are some confusions with terminology. Namely, the same thing is referred to with different names. I have run across a few but can only remember one for now. I will reply to this thread with more examples as I find them.
Here is the main one that caused me a lot of confusion at the beginning, and still does sometimes:
Booking Form / RSVP Template / Registration Form
The template should have the same name as the form it is used in. “Registration” is a very bad name for this form. Booking or RSVP are both fine, but you should choose only one name that appears everywhere (at least in the admin and docs).