Hi,
I am working on cq5 web site development from last 1.5 years and two sprint are deployed on production as well.
I have total experience 4.5 in java development with Spring3/4, Hibernate3/4, maven, struts2 and other technology.
About Cq5 or Adobe Aem tool
So it a content management tool which manage all content and provide fast caching by template, component.
For further training you have hire me.