@Nicole2905
Check your listing - as a new host you may have a 20% discount set up on your listing in addition to a high long term discount.]
I would advise.
1. remove the new host discount
2. lower the long term stay discount
3. Make sure you aren't on smart pricing - price in comparison with local hosts for your sort of property
4. Only open your calendar to maximum two or three week stay
5. Turn off instant book until you build up some experience of vetting guests.
I wouldn't accept these bookings in your situation