What types of classes (or degree/certification) can I add to my B.S. in Marketing?

[Tj]

I graduated 6 years ago with a B.S. in Marketing. The field has changed so much from the traditional methods I was trained in and has finally reached the digital age.

My goal is to work in Marketing Communications, but I'm finding that my experience just doesn't cut it. Companies are looking for team members who can build a website, design graphics, be a social media expert, design, create and print marketing materials, etc.

I am well-aware of the various social media methods, but I'm not a pro as I do not understand the methodology behind creating a "social media marketing plan". Where can I learn this stuff? Is there a class or certification program in West Michigan?

I have no idea how to design a website unless it's one of those easy template styles you can do online. I'm considering going back to college. Any solid advice would be great.