Thule is very powerful Framework and whoever knows about php and heards a little bit framework can make a site very easily. If you are beginner of PHP and get used to pure PHP, don't worry about adaptation to new feature. There are several options for that PHPer which are for performance and maintenance with template engine. One of several strong points is able to cover multiple service for just one server.

First , you have to download here and then read the document of installation.
It is easy to install, just copy and unzip in your directory.

You can find the sample of code and how to use the framework in package of thule, don't worry about learning curve. It will be taken very shortly to understand.