No problem re the name, @Kate-and-Guy0. Just hit the "@" symbol, as I have done with your name, when you are referring to someone and it will both spell it for you and notify the person.
I am unsure about that Instant Book have-your-back thing. I have never put it to the test. Forum wisdom seems to be that if you need to cancel someone - really need to because something is very wrong - you should call Airbnb first and get them to do it. Just up-and-cancelling can get you penalized. It will be best, though, if someone answers who has experience with that. I'm serious when I say don't take my word for it!
What I can tell you is that it is a very good idea to Snooze your listing while you are getting the hang of everything. Take a look in the Help Centre for how to do that. Then look around the Help Centre some more, read some threads that interest you in this forum (the extremes can be as good as any thriller!), watch all the videos and tutorials Airbnb makes available. Once you are comfortable with it, hit Listed again, and go from there.
All the best with hosting! It is very rewarding, but it is one of those things that works best if you are armed with knowledge rather than just learning as you go.