Welcome to Steemit mundosteem. Let me know if you got any questions about Steem/Steemit. The official FAQ can be found here and is quite extensive https://steemit.com/faq.html - Also, Steemit is just one of the sites using Steem the blockchain. We also have Dtube, Dsound and Steepshot if you prefer videos,music or pictures instead of blogging content. And many more of course!
Thank you for welcoming us, Janne. We'll let you know if we got a doubt about it. Have a good day!