The final option is to look at a four-year bachelor's degree at your university of choice. A university education will be very expensive, will take four years to complete and you will not likely find a program specifically targeted towards becoming a webmaster. The closest thing you're likely to find is a degree in Computer Science or some variation thereof that will offer some web-oriented classes.
Why would you choose such an expensive, time consuming, non-targeted option? The answer is that you gain far more out of a university education than training on how to make web pages and how to use a database. You get a broad education experience where you learn to learn. If you've applied yourself, a university education will allow you to pick up all of the skills you need to do almost anything on your own. You'll be able to do this for the rest of your life.
With this kind of education behind you, you'll be able to flex and adapt to the changing landscape of the web. If you spend some time researching the history of the web, you'll quickly appreciate just how important it is to be able to adapt to emerging technologies.