The overview is what you should be learning but 3k is way way too much. Every topic they are covering can be found on google or a decent book from Amazon. I suggest buying a cheap hostmonster account and learning some PHP. This tutorial is pretty good http://devzone.zend.com/6/php-101-php-for-the-absolute-begin...

Don't just focus on front end skills and think you don't have to learn how it works on the backend because a frontend is just something to look at it if doesn't have the server side component.