Most users will be able to easily install evoMailer
If you ever installed a similar PHP/MySQL app then you will see that this will be the easiest installation you ever did.
Inside your downloadable package you will find a setUp.html with detailed instructions. In short,
You create a MySQL database (with a user/password) at your server and edit evoMailer settings file accordingly.
You upload all files at your server and using your browser you load a page to create your database tables.
However, if you have any difficulties or you are not sure we can do it for you and ensure that things will work absolutely fine.
Installation covers only evoMailer. It does not include installation of required components such as PHP, database (MySQL/MariaDB), web server (Apache/IIS), Mail server or MTA. Such components should already be available at your server.
Installation does not include script modifications or customizing.