We must access Plesk and go to Domains > click on our domain and for the installation of the latest version of Moodle, we must have version 7.0 or higher of PHP active:

If it is not, we have to change it, we must follow the procedure explained in this guide to do it:
​https://www.profesionalhosting.com/soporte-en-linea/panel-plesk/cambiar-versin-php.html

Once inside we go to All available applications:

And we look for Moodle:

Now Custom installation:

Click on Accept conditions and Next:

Fill in the form data and click on Install:

With this, the download of Moodle will begin and then the subsequent installation

Once installed, we can access directly from Plesk to the administration and know what our access credentials are: