Face ID is not capturing my face in setup, iPhone 12

I have been trying to reset my Face ID because it stopped working. I have read all discussion on setting up face ID. I follow all the steps correctly. When I position my face and turn it completely in perfect lighting I get no response. There are no messages asking me to try again. The first time I set it up there was a circle of radiating lines following my turning but now all I have on the screen are the corners showing me where to position my face. I position correctly and turn, but there is no response. Neither is there any prompt other than the red cancel. What do I do? I am really unhappy with constantly having to input my password even though most of the time I am home and do not need security on my phone. It seems it is impossible to remove the security as well. Please offer solutions