Ok first the pros and cons of learning at school:
Pros: faster learning, hopefully good teachers, access to equipment and also readings and other resources
Cons: expensive, daytime classes = less work and $$ coming in, at the whim of the teacher as to what you learn, have to share the equipment with others often resulting in late-night sessions outside of class
Versus the pros and cons of DIY:
Pros: do it at your own pace and in own hours, less expensive, can do it on your own equipment
Cons: slow, at the mercy of the resources you have available, need to have your own equipment, and may learn to do things the wrong way
If you want to DIY then I suggest load up your computer with some industry standard software like Pro Tools and Logic, get a couple of mics and small mixer, a pair of speakers and start recoding your friends and experimenting at home. Some great books to help you are:
- "Modern recording Techniques" by Huber & Runstein, published by Focal Press. The main reference for starting out in engineering and will last a lifetime.
- "Home Recording for musicians for Dummies" by Jeff Strong, published by the same people who do all the Dummies books and great for getting started
I think the scene is similar in the US as it is in most other countries - the rise and dominance of the home studio has led to the closure or downsizing of large studios, and therefore less internships and assistant/runner/gopher jobs around.
It used to be that getting a job as a runner at a studio was the first step towards becoming and assistant, and then finally a senior engineer and you would learn on the job. Much less so these days, those jobs are very rare now. The mortgage bust and financial crisis you guys suffered last year doesn't help either
However where you live is a good start - better to be in California than Idaho or Kansas

The best cities in the US for studio industry I think are still LA, Nashville and New York.