The Internet is a big place - and you are only one person, so don't think that you can see it all. There are really two ways to explore the Internet which mirror the ways you might use a library:
Finding a specific piece of information on the Internet can be a real challenge. The reason for this is that the Internet is not like the library at all. A library is a centralized collection of books (or at least a limited set of well-coordinated centers). You go to one location to find the reference you need. On the other hand, there is no central collection on the Internet. The material on the Internet resides on thousands of individual computers. The people running these computers are responsible only for the information on their own machines. So, when you need to find something specific, you have to find which machine it's on and what the name of the specific document is. Unfortunately, there is no centralized "card catalog" of the Internet like there are in libraries. Fortunately though, there are computer programs that can scan the Internet and collect some pointers to documents that may be of interest.
Fortunately for you, the creators of your browser (Netscape, etc.) have made it easy to look for things on the web. You should have a button like the one above, or a menu item that will take you to a page chock full of search engines. These engines go out at night and look at millions of different sites, collecting and cataloging the contents of every page. All you have to do is type in the keywords you are looking for and you will be presented with a list of "hits," usually arranged in order of relavence. If you need to narrow your search, add more keywords. You may have to read the instructions in each search engine to find out how to use the logical operators "and," "or," and "not" that will allow you to make your search very specific. One of my favorite search engines is Alta Vista, which is not always listed on Netscape's search engine page.
A few places that have collections of search engines: