Everyone must be a beginner at something sometime in his life. And at some point, all of us were new to internet. Even most arrogant webmaster who can create sites with his eyes closed was, once, struggling with concepts of vast network that now connects most of planet.
So what's best course of action when you are a beginner? I mean, most people want to look like they know what they are talking about. Sometimes hardest thing in entire world is to admit you know nothing or very little about a subject.
Yet, when you are a beginner at something, that's what you have to do. You must admit to yourself (at least) that you are a beginner and you must understand that there is something to learn about subject. Learning about internet is no exception to this rule.
My advice is to just jump in and start learning all you can learn. How you learn about internet depends upon your own preference and style. Also remember that you can combine learning styles as desired or needed to suit your taste.
High School or college courses - Some people learn best in a scholastic atmosphere. Personally, this drives me up wall, but others thrive on a campus with lecture halls, teachers, home room and hall monitors. If this describes how you best like to learn, then by all means go for it. If you are pressed for time, remember there are night and weekend classes available at most educational facilities. Not much money? Try community colleges - they are inexpensive and often have excellent computer curricula.
Informational Web Sites - Our site has a large amount of information designed to help people learn about internet. There are many other such sites and some of them are quite useful indeed. In fact, we learned much of what we know from many of these sites, and use them to this day to expand upon our knowledge. Just be careful, however, that you understand motivation of these web sites - often they are honest, but sometimes they are attempting to get you to purchase something that you may not need.
Trade Courses - You can find many trade schools which offer courses. These differ from college in that they very short (a day to a week), they are usually very expensive (a few hundred to a few thousand per class), and they are of limited focus and duration. Courses are great for focused, specific knowledge or for earning a certification - and they are wonderful when bill is picked up by company you work for. Otherwise, there are cheaper, better ways to learn your skills.
Books - Don't forget books. Your local library or bookstore is one of your best friends, if used properly. It never ceases to amaze me to watch people spend small fortunes on books, courses, tapes, and classes when a book checked our from their tax-supported library would serve their purposes just fine. Think about it - how often will you be reading that book on Microsoft Excel again?
On The Job Training - This is absolute best way to learn. If you want to be a webmaster, then pick up a book, learn basics, then find a client who will pay you a few hundred bucks to create a web site. If you want to become a computer specialist, then go get a job as a computer operator. This is best way to learn.