Hi KDH, and welcome to the forum.
Personally, I would advise against going to college or buying web design courses online. It's true that there are some nice websites out there which you can pay for the privilege of using - Team Treehouse (http://teamtreehouse.com/) in particular looks nice - but you can learn much of what you need to know for free. I don't know if you have any programming experience at all, or what your level of knowledge of the web in general is, but I'll attempt to give you a few tips.
http://dev.opera.com/articles/view/1-introduction-to-the-web-standards-cur/ - Opera's web standards curriculum; starts with the basics
Depending on your interests, you might want to check out:
http://learncodethehardway.org/ - esp. for the tutorials on SQL, something which you'll probably need to know a little of;
http://www.codecademy.com/ and/or http://www.khanacademy.org/cs - if you've no experience of programming at all and need to grasp some of the basics, it might be worth a look.
Something you'll appreciate is that the web is a constantly changing beast, which means that we all have to invest quite a bit of time in keeping up to date with what's going on. For this, I'd recommend subscribing to a selection of web articles and podcasts via Google Reader. A few of the ones I like at the moment are:
.net magazine www.netmagazine.com/
CSS Tricks css-tricks.com
Smashing Magazine www.smashingmagazine.com/
One podcast that I'd recommend you listen to - it's so good that I recommend you listen to all of the available episodes! - is The Web Ahead, 5by5.tv/webahead which provides an approachable introduction to many current web development topics. (If anyone else has any podcast recommendations, I'd be happy to see them - always on the look out for new things to try.)
Hope all of the above helps. I honestly think that the best way to learn how to do it is to just start tinkering around with things; if there's a particular site that you like, have a look at the source code and try and work out what's going on, and whether you can replicate it yourself.