As others have said try building something. I would add the following: Start with something really, really simple - like a single page website (and I mean lite

As others have said try building something. I would add the following: Start with something really, really simple - like a single page website (and I mean literally a single page of HTML). Then incrementally add features, adding the PHP code to, for example, read content from a database. Every day add a little feature or a tweak or fix a bug. After a couple of months you will be surprised by what you have achieved. But you don't need to stop there. Keep adding little features - eventually you will end up with a CMS. The thing about this approach is you never burn out because you work in small doses, and the project never "runs out" because there's always something new you can add. But because you work on it incrementally you are more likely to get somewhere than if you sit down one day to "write the next Google". Hope that helps and good luck!