Here's a page I put together so people new to Steem to can get familiar with the main concepts of Steem, like steem, steem dollars, steem power, voting power, witnesses, etc. It's mostly links to articles by other Steem users. And it also has some links to pages that show user stats and some sister sites to Steemit. You might find it useful:

https://steemit.com/introduceyourself/@doule/a-steemit-faq-especially-for-newbies-the-most-helpful-pages-start-here-and-get-up-to-speed-fast