@Karen3489 Unfortunately new hosts are often targeted by scammers who have no real identity, no reviews and no pictures. They ask for long rentals, usually over several months, and want to communicate off of the AirBnB platform through other means, like Whatsapp.
As a new host, you may want to turn off IB until you are more comfortable with the guests that you attract. If you do have IB turned on, set your Instant book requirements to the most secure requirements (see picture). Second, push out your acceptance window and do not take guests on the same day as they message. Do not take guests for one night until you are comfortable with the process.
Scammers will want you to communicate off platform, will want to pay with a bogus check from their "employer", will want to stay for mulitiple months, etc. Not all guests are scammers -- there are genuine people out there, but as a new host, stay alert and simply don't accept any reservation that makes you uncomfortable.