For the 404 error, please ensure that the admin and sub-folder install are present along with all files in the download. If they are, please contact your hosting provider to ensure that you do not have anything blocking that folder which would result in the 404.
You would need to create the database and database user before hand on your hosting. Note down how to connect, the database name, user, and password.
PHP 8.2 is not yet supported. You will need to use PHP 8.0 or 8.1.
You can see the requirement checker here: