Hi @Benjamin1216
Nice job! In terms of not attracting partiers or those who will be disrespectful of your lovely cottage- I have a couple of thoughts.
Do you live on the property or nearby? If so I would mention it, in a nice way that offers "assistance if needed otherwise we allow you your privacy" kind of thing. Right now there is nothing about you as a host.
Maybe don't use Instant book right away, ask questions first, get a feel for who the guest is.
Stick to 4 guests max which is right for your place, don't mention you'll take up to 6.
You might consider 2 listings- a one bedroom listing, with the office/Murphy bed room locked off. (Or offer it as an office only) And a two bedroom listing with the Murphy bed already made up, to lesson the wear and tear on it. Link the calendars to avoid double booking.
Cheers