@Vjollca0, I'm a little confused as well. Though you've not yet had a completed booking, I note that you've been able to active Instant Book. Normally, this is not possible. Also, if you have IB on, guests don't need to make a request for pre-approval.
I wonder whether there's some kind of glitch.
I hope someone more experienced than I am can help.
In any case, before you take on any guests, I strongly recommend that you turn off Instant Book. Especially for a new host, IB can be a recipe for disaster, as you have little chance to get a clear idea as to who is booking.
I also suggest the following:
1. Request a Secure Deposit. I can almost guarantee that at some point you'd regret not having one;
2. Change your cancellation policy from flexible to moderate or - my own preference - even strict;
3. Get rid of the Extra Guest No Charge box, as it's misleading. You can do this by going to your settings entering a very high price (e.g. $250) in the box, and hitting Save. Once the page refreshes, the box will be gone;
4. Create a much more comprehensive and clear set of House Rules. You need to state specifically, even in the smallest detail, what the boundaries are.