Any tutorial to use my LEMP server to serve many WP sites?

Ok thanks I’ll give a try

I have my root web directory at /var/www/html/ and following the tutorial, I created a folder with the name Wordpress.

What I actually need is to have at the root directory, my main corporative website which is even in HTML so I just could upload the files and that is. But then, I need to have all my wp sites organized in a directory. I will call this directory secure/

What I would like to do, is configure 1 WP installation with the default plugins that I always use, like W3 supercache, Toast Seo, etc, and then, once I need a new WP installation, I think that I should do this:

1. Copy the WP clean template directory installation, into the new one.
2. Copy the WP database
3. Open the wp-config,php and change the name of the database
4. Copy the configuration file in /etc/nginx/sites-enabled/, change the server_name and setting web root directory.

Then, I’m not sure if the following commands are correct:

1. To duplicate the directory wordpress I will cp -r wordpress newfoldername
2. To copy the database, I don’t know how to performance it.
3. To edit the wp-config.php, I will move to the directory name cd directoryname and edit the file nano wp-config.php
4. To copy the nginx configuration file I don’t know how to do it, and to edit the new copied file I will do it typing sudo nano /etc/nginx/sites-available/newfile

Am I in the right way? Could someone let me know if the steps are correct and help how to copy/clone the database and copy the nginx configuration file?

Many thanks