Thread:Annabeth and Percy/@comment-11571704-20150326001640/@comment-25749010-20150407012924

You can teach it to yourself. Combining both history and philosophy will make it easier for you. Actually, philosophy started with "History of Philosophy" for me :P

Start by studying the historic eras (separately). Read about the ancient era, then do a research of all the philosophers from that era. Once you have them, read about them separately. Repeat the process with the Middle Ages, modern era and the postmodern (or contemporary) era. It's a large process, but once you know about the different philosophers and their theories, you'll be able to go further and study more complex topics.