It's one of the world's most used websites - there are more than 20 billion page views a month. That's hard to fathom, isn't it? But right now, don't try to: just dip into this for a few moments. It's an audio-visualization of only around 15% of the edits happening right now in the English Wikipedia - that's just the anonymous ones. (In "about", you can pick one of 10 other Wikipedia language versions.) The pitch of the sound and size of the bubble indicates size of the edit. (Sound might not work on all mobile devices.)
Wikipedians from around the world are converging now on Hong Kong for the annual get-together (Wikimania). Read about last year's here in my post, Are you a knowledge philanthropist? If not, why not?
And there's more at this post about Wikipedia's recent visit to the National Institutes of Health (NIH): the world's biggest encyclopedia met the world's biggest medical library! There are links there too to resources to get you started at Wikipedia. There's always someone willing to help if you need. As you've just seen, there are plenty online right now!
The thoughts Hilda Bastian expresses here are personal, and do not necessarily reflect the views of the National Institutes of Health or the U.S. Department of Health and Human Services.