@Catherine2627 Hosts do not have your credit card information. The info you upload to your account is seen by Airbnb, but not the host. Hosts have zero information about a guest other than seeing it posted that you have uploaded verified ID, an email address and a phone number. But hosts don't see your ID, your email address or your phone number and even after a booking is confirmed, only the guest's phone number is shown, as the host's is to the guest.
As a new user with no reviews for hosts to go on, most hosts will want to see that you have uploaded verified ID to the Airbnb site (again, hosts do not see the actual info, just that you have been verified) and it is to your advantage to fill out some profile info- a short paragraph about yourself, so hosts can get a sense of who they are renting to.
What is the personal information the host was asking you for?