@Christine2987 From the moment a Request comes in, you have 24 hours to correspond with the guest before making your decision about whether to accept them. You'll find that how the guest communicates and answers your questions is a much more accurate predictor of how they'll be as guests than reviews are. Things you might ask guests include what brings them to the area, what inspired them to choose your listing, and a confirmation that they're aware they're booking a room in a shared house. On that last point: new Airbnb users very frequently book without reading the listing carefully and don't understand that "Private Room" means they don't have the whole house to themselves. This is a common reason for abrupt cancellations.
I really can't recommend Instant Book to hosts with homestay listings, nor to new hosts still learning the ropes. Your first few hosting experiences and reviews are the most crucial to establishing your reputation, so in this stage you want to make sure each guest is a suitable fit. You can always switch back to IB at a later stage after you know how to spot and mitigate all the potential trouble spots.
Another thing: looking at your listing, I can see how easily a guest might miss the important detail that they're not getting a whole apartment. The condo is very nice but looks brand-new and built especially for guests and not particularly lived-in, and there's only one very fleeting reference to it being "shared." Guests who like staying in shared home with strangers were already a small niche group before Covid, but now just a tiny fraction of that sliver remains. Those that are still enthusiastic about your type of offering want to know something about who/how many people they're sharing the home with, and how much interaction they can expect. I'd recommend foregrounding this information and making your friendly hospitality a selling point, rather than hiding it deep in the description text.