Though not a “marketplace”, such as ThemeForest, with multiple theme authors, Elegant Themes is well established and worth checking out.
With access to over 75 themes for $39/yr, a growing feature list and eye for design, they are worth checking out.
For the all-inclusive price of $39, you are only paying $.50 per theme!
You are also free to use their themes to build websites for your clients.
Lots to learn as you get started – $39 is hard to beat. Check out their Gallery and see if anything strikes your fancy.
Lynda.com introduced me to a whole new world of learning software via video tutorials, available 24-hrs online.
Once I saw it, I felt like I could learn anything because they had a video tutorial for just about every application I was hoping to learn.
And the way in which I could learn made such a difference; all my senses (learning styles) engaged. I essentially had the ideal situation for learning a new “instrument”, through professionally prepared lessons, at my own pace, at any time.
Tutorials you might consider, should you be in a situation similar as I regarding websites, Content Management Systems (CMS), etc. might include topics like WordPress, HTML5, CSS3, and Web Design Fundamentals.