Welcome to you !
On this post you will have some really nice explaination :)
https://steemit.com/steemit/@kevinwong/3-steps-for-steemit-newbies this is a kind of tutorial for newbiies !

here https://steemit.com/steem/@zebu/the-basics-about-what-to-know-about-steemit you will find one of my post that explain other interesting/important things to know when you start on the platform ! I do'nt share it for you to upvote or comment don't worry, just to help !

Enjoy your experience,
Zebu :)