So here's a pretty neat YouTube channel for you. It's called Crash Course. What Crash Course is, is a series of short lectures on various topics that, reasonably, you might have expected to be covered in school at some point or other. The channel is currently focused on American history and chemistry, though there is also world history, biology, ecology and literature in the archive. Hank Green handles the science topics; John Green handles history and literature. Obviously, you're not going to get a detailed examination; after all, it is a crash course. But it'll give you the basics, and if you're still interested at the end, well, plenty of places to go after that.
The most recent addition to the channel is a course on Progressive-era Presidents, but the one I'm picking as a sample is the course on the history and basics of Islam. Enjoy.