John December's Internet Web Text offers an introduction to the Internet and summarizes some of its aspects and usage. This document also provides many useful starting points for Internet exploration, including lists maintaned by the same author.
Some other useful pages to begin your exploration with are:
Other hierarchical resource lists, classified by:
A slightly different list is Internet Tools Summary. The purpose of this document is to list tools available on the Internet that are used for network information retrieval (NIR) and Computer-Mediated Communication (CMC).
Search the Web by keywords
It is also possible to search for information in WWW using keywords. Many different searching tools are collected in comprehensive lists like W3 search engines list and NEXOR's CUSI list. Some more popular searchers included in these lists are
On the net you can also find many electronic books, magazines and on-line documentation (separate document)