Hello Natalia,
I'm sorry, I don't have the capacity to guide anyone through the Steem universe right now. Besides, the matter is very, very complex. Yes, on the one hand Steemit is of course social media, but it is also an ecosystem based on cryptocurrency STEEM. Instead of "like" you get "rewards", so you can earn coins.
At the beginning you should read incredibly much, then you will understand some connections better. Also, I recommend you to join the Newcomers' Community. Here you will be given "tasks" by @cryptokannon et. al. that you can complete as a post. After that you will know your way around... ;-)
If you have specific questions, you can always contact users there, yes, you are also welcome to contact me.
Kind regards,
Chriddi