If you're looking for learning material, I recommend [From Flat PHP to Symfony2, [URL="https://github.com/fabpot/Create-Your-Framework/tree/master/book"]Create Your Framework book, and [URL="http://www.amazon.com/Objects-Patterns-Practice-Experts-Source/dp/143022925X"]PHP Objects, Patterns and Practice](http://symfony.com/doc/2.0/book/from_flat_php_to_symfony2.html). Beyond that, continue to look at the code from the best and popular frameworks, such as Symfony, Zend, Cake, and CI.
Many of the modern frameworks use [database abstraction layers and [URL="http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/index.html"]object relational mappers](http://docs.doctrine-project.org/projects/doctrine-dbal/en/latest/index.html). Although these tools may be more than you need right now. Perhaps we could help you tighten up your PDO code.
It may be worthwhile to be in contact with a few other more experienced people who you can call on if you get stuck. Try to do the jobs yourself, but have a safety net ready if you can't.
If your goal is to get into web development, then speaking as someone who went through four years of college, I don't think the degree is worth it. You'll be dropping about $40K. Half of that will be spent on general education courses that are largely a repeat of high school. Half of your computer courses will be in theoretical fields that you won't use in your day-to-day work. And the other half of computer courses that are actually relevant will teach only the basics.
A lot of employers in this field, especially development agencies, place little weight on education. They care only about your knowledge and skill, regardless of how you acquired that skill. When I was last hired to an agency-style job, I didn't even bother to mention my degree. If you want to be good in this field, then it will require a lot of self-learning.
The good news is that, thanks to the wonders of the Internet, you can learn from the very best in the field. They [blog, [URL="http://www.youtube.com/playlist?list=PL5586336C26BDB324"]speak, [URL="https://twitter.com/dalmaer"]tweet, and [URL="https://developer.mozilla.org/en-US/learn"]an assorted collection of other high quality resources. And of course there's always the [URL="http://php.net/manual/en/index.php"]manuals and [URL="http://www.w3.org/TR/html5/"]specifications](http://fabien.potencier.org/).
But to be safe, before you consider taking my advice, I also suggest that you scope out the kinds of places where you'd like to work, and get in touch. Ask the employers directly what kind of background they look for, what kind of skills they look for, and get their advice on how best to learn those skills.