@Lyndall5 OMG...if a group of random people is out there with the keys to your house, where you live, the very first thing you need to do right now is change your locks. You have every reason to be worried - these people are obviously not who they claimed to be.
The next thing I hope that you do is "Snooze" your listing. That doesn't delete it, it just temporarily blocks your calendar and removes you from the Search results. This is necessary, because there are several changes you need to make and some studying you should do before it would make any sense to accept bookings. In its current state, your listing will only attract people who pose an immediate threat to your safety and well-being, and more disasters are guaranteed.
The most important thing you can do right now read through the Help Center and give yourself a thorough education in how Airbnb works. Right away, you'll learn that you can turn off Instant Book and require guests to send Requests so that you can vet them before getting stuck with a booking. And also that third-party bookings aren't allowed - they must be made with the account of one of the people actually staying. Looking through these forums can prepare you for a lot of issues that might come up, from the minor ones (stains, late checkouts) to the major ones that endanger your safety. You want to be able to prevent as many as you can and be forearmed with a plan for how to deal with the rest.
If after learning the ropes, you still feel that you want to be an Airbnb host, take a look at some of your successful competitors and note how they photograph and describe their homes. Examples:
https://www.airbnb.com/rooms/25415480
https://www.airbnb.com/rooms/39671338
https://www.airbnb.com/rooms/23600871
These are some of the other choices one of your target guests will have when searching for a room in your area and price range. Now, pull up your listing on a computer (not a phone): https://www.airbnb.com/rooms/52764570/
What's the first thing you notice? Is it that the lead photo (the one that appears in Search results) is nothing but a blank white wall and the edge of a bed? Or that the description doesn't say anything about the home - including important details like who else lives there and what areas other than the bedroom are accessible to guests? I recommend going through the listing editor and following all the prompts to get as much useful information into your listing as possible. And perhaps enlisting the help of a friend with a camera to shoot photos where the subject is actually in the frame and in focus.
As you build your listing, don't forget to preview it and see it from the guest's perspective. The end result should be a listing that you as a guest would choose to book even if one of those other three options were available.