Take a formal class. Most community colleges offer at least one introductory class in anthropology, which comprises a basic survey of the entire field. You will learn something about physical anthropology--like the difference between human bones and ape bones and the difference between male and female bones. You will also learn about some of the famous anthropologists such as Mead, Leakey and Dart, as well as early cities and cultures like Ur, Troy and the Etruscans. You may be exposed to some theories about the development of language. You will definitely get a survey of the field that will form a solid basis for further investigations.
Read books about anthropology. In addition to constituting one of the easiest and most pleasant ways to learn anthropology, it makes a valuable addition to whichever academic path you choose. In your local library you will find many books on anthropology, but not all in the same place. In the Dewey decimal system, used by most libraries, you will find physical anthropology books in 573 (sciences) and cultural anthropology books in 301 (sociology). If your interest lies in language, the anthropology books will appear scattered throughout the 400's and if you want to focus on evolution, the books will be in 575. You can also find dozens of books published each year in bookstores and online.
Check out the anthropology shows on television, particularly on PBS, Discovery and other science channels. Several programs on evolution and human origins have screened in recent years; you can find them on NetFlix, as well as reruns on TV stations. The BBC's 13-part series "The Ascent of Man" by Jacob Bronowski makes a reliable introduction to anthropology, and professors often screen it in college classes.