You can now tick a solution (it can be your own last post or any other you find useful) That would trigger a message warning posters that the question have been solved. It won’t stop answers altogether and you will probably still get a few. You can also silence the thread or ask moderators to close it.
You may find these threads useful to help you prepare for a video call.
Good luck with your first sitters. I’m sure you’ll have a great experience.