first remove the PIN
settings -> accounts -> sign-in options
click on Windows Hello PIN and click the remove button.
then to remove the need to enter the password on Boot
click start
type netplwiz and press enter
untick "users must enter a username and password..."
click apply
(if it is already unticked, tick the box and click apply then untick it again and click apply)
you will be asked for a username and password (used to automatically log on).
if you are using a Microsoft account enter the FULL email address.
enter and verify your password and click ok
next time you boot the computer it will automatically log on.
NOTE - there is no need to switch to a local account, it WORKS perfectly well with a Microsoft account, as long as you enter the full email address in the username field.
blank passwords are NOT a good idea.
do not forget the password, there are times you will need it to show that it is you making changes.
to prevent it asking for a password when waking from sleep, go to settings -> accounts -> sign-in options
under "require sign-in" select Never.