Owner of http://www.trovatten.com and co-founder of http://skillpocket.com/ - Been in the digital marketing game for 6 years. I've started my journey in Adwords and since I've worked hands-on with Analytics, SEO, Email-marketing, Blogging and Social media.
Don't worry about Google Page Rank. It's already been declared dead (http://www.searchenginejournal.com/google-will-probably-updating-toolbar-pagerank-john-mueller-confirms/117691/).
Instead you should figure out how to get high quality and editoral links - which is the essence of page rank.