I had a horrible time with editing. Preview your listing then chose to edit your listing, go through section by section to make changes. There are some options for editing that are NOT available till you post your listing. You will not find that information ANYWHERE! After hours of searching and editing through time and time again. I figued the only thing I had not done was post the listing. After I did then I was able to make changes to cancellation policy (which was my #1 edit I wanted to do before posting). The problem is as soon as the listing was posted there started being a lot of interest and requests for bookings before I got a good understanding to how AirBNB worked.
So go ahead and post the listing. Then mark your calendar to block out dates till you are ready to host with all permits, house manuals, guestbook, etc. ready and in place before someone books your listing with instant booking!
Good Luck!