This is great.  
I also really like Team Treehouse for online programming courses.  It's a monthly fee of $25 but you can do as many courses as you desire, and there is lots of help if you get stuck.  They even do little quizzes to make sure you're learning. 

HTML/CSS is a great first step... and essential for any web application.  This very much feels like when anyone could create mobile phone apps, lots of people made a lot of money in those early days.