Here's what worked for me:
I assume you have a basic understanding of HTML/CSS/Programming. If not, it's really easy to google various tutorials that will get you used to the basics. Your next step would be setting up a development environment for PHP.
I'd suggest something like: http://www.apachefriends.org/en/xampp-windows.html
If you're not on a Windows machine, look into whatever works for your OS.
I'd then suggest heading over to CodeIgniter: http://codeigniter.com/
Once you're there, I'd jump into the Blog tutorial: codeigniter.com/tutorials/
You don't need to build the blog, just watch the video to get a general idea of what's going on. When you're done with that go through the user guide: codeigniter.com/user_guide/
After you've gone through both of those steps, you should be able to figure out anything else you need to create a basic content management system. Add a login system to your blog that requires the user to login to post comments.
Try to keep all of your database logic in the model files.
Then, try integrating something like CKEditor for creating new articles. Then just keep adding to your basic system.
Once you have your basic CMS down, you can start adding some designs for your site. The best solution is just to find a tutorial for each thing you want to do. Google is your best friend and due to how simple basic HTML/CSS is, you should have no troubles figuring anything out.
PHP/CodeIgniter might not be the best options for development, there are better languages and frameworks IMO; however, PHP and CI are very easy to jump into. PHP is easy to setup and you don't need to touch the command line. CodeIgniter doesn't include a lot of the 'magic' of other frameworks, it's also not as complex as Zend, so it's easier to understand and helps you build a solid understanding.
Once you've finished your first project, you can start looking into more advanced techniques, as well as other frameworks and languages. These should all be a lot easier to understand and you should have a strong grasp of what works for you.