Anitya is the easier theme from MyconcreteLab to work with, thanks to all new features in concrete5.7 that take care of tons of design management. In this case tons of answers can be found in the official documentation from Concrete5.org
In this section i explain things that is specific to Anitya, his structure, classes, attributes,.. but nothing about installation, customization, .. where concrete5.org are deeply, substantially, more effective than me.
In any way, I'm listening to all your questions, problems or bugs you encounter when using this theme. To do this, simply create a support ticket via the theme page on concrete5.