Where do I go from here?

Hey /r/webdev. I fear I may be coming off the same as every other person asking for general career direction on this subreddit, but I would just love some input for my specific situation. Enough apologizing, here it is.

I'm a 22 year old computer science graduate who has only recently (less than six months ago) gotten into web development and it's given me my drive to do programming again. The mix of designing and programming really hits a note with my brain because I'm neither fully right or fully left brained, as some say.

I just completed my first full, production web site for a friend's business which I built using PHP with the Codeigniter framework, HTML5BP and Twitter Bootstrap. It's pretty basic in terms of scope, but it does include form validation, automated emailing and such.

Building that website really helped me learn the basics of web development but now there are just SO many directions I could go. I would love to work for myself and freelance build websites, but I don't know what the next logical progression in my my learning should be.

* Do I learn a CMS like Joomla, Wordpress, or Drupal? * Do I learn a more powerful MVC framework like Zend?

I just don't know what the next most logical step should be for me to progress and be able to offer a wider range of skills, such as being able to build a small scale e-commerce site, for example.

Thanks for any input! This subreddit has really helped a lot.