What do you want to know about? There's plenty online that explains the 4 noble truths which are the basic precepts of Buddhism. Buddhanet has lots of general info and articles. You can also learn more from your local Buddhist meditation group - mine run a meditation class and also a Dharma discussion group which is essentially a Buddhist book club. You could attend a retreat? There really is so much information out there, it can be hard to know where to start but it's really ok to just start with what you stumble upon and that will prompt questions and ideas to follow.

What is it that appeals to you? What do you need from it? A belief/meaning system? Community? Tools for your mind, your lifestyle or your relationships?

ETA: The Art Of Happiness is also a really accessible first-read