Before installing PDP, you need to check that your web hosting provider fulfills the necessary conditions and that you yourself possess the required skills (don't panic! it isn't complicated). Neither of the two should be a problem, but it is wise to verify first.
PDP will not create database name, database username and password during installation. You need to create database and access information before installation.
For a list of requirements on your web host, such as PHP library, see the official requirement page.
You will need to know how to use a text editor to edit the main configuration file if you want to run re-install(just turn on/off installed mode). If you are a Windows user, Notepad will do.
You will need to be able to use an FTP program to upload files and set file permissions (optional). You could choose FileZilla for this task, it is free software.
That's it! Now you are all set to go on to Installation steps.