Installing Drupal

Short version. I messed up Drupal (500 error). I am trying to reinstall but keep getting an error that it is already installed. I have deleted the public files and the database. What did I miss?

I am starting over with composer skills learned recently on development system.

Previously I had a working sub-directory from legacy install and wanted to begin over with composer recommended setup.

First I deleted the Drupal 9 installation.
 

composer create-project drupal/recommended-project /var/www/html/drupal

then I did a copy of the settings configuration.

I just recently installed Druple on a2hosting site. I install a couple modules which came back requiring addional modules. I download them from Drupal.org (many) Seemed each module need 5 more to work. 

Once done I clicked on of each to enable and chicked install. I got an error "The website encountered an unexpected error. Please try again later.The website encountered an unexpected error. Please try again later."

See https://drupp.kampautolease.nl 

Where is my site? I see only text..
 

I am currently trying to import the image.settings.yml using drush cim. The image module is activated and all is working tn the site. BUT if i edit the file, to be specific setting the false values to true and reimport using drush cim i get an error saying that "image.settings plugin does not exist."

What i try is to set

allow_insecure_derivatives: true
suppress_itok_output: true

It once was possible using the settings.php overrides but in D9 that doesnt work no more as it seems.

After I get the warning about Clean Url I continue anyway but after done home is ok and any link clicked crashes with 404 Not Found.

a2enmod rewrite
Module rewrite already enabled
 

I saw in the past base_url fixed it but that was pre Drupal 8-9

How I duplicate it repeatedly.

I drop drupal9 and also remove the html/drupal directory

Apache2 has