Sort:  

I read it several times but still don't understand all this technical stuff 😁😂😂😂. So i suppose, everybody can mine Steem by writing posts and comments?

Maybe that's not a strict definition of mining but in the end you receive parts of STEEM for that, so pretty much yes ;-)
(Most of the newly created STEEM goes to authors and curators)

Ohhh now it's getting clear. Thanks a lot for explanation! 😉😉😉😊

My pleasure :-)