Welcome to Steemit @juanjoseca.
Steemit is in it's Beta stadium. A lot of miracles seem to provoke you. You will earn STEEM if you produce unique content (authoring), write comments (interaction) and making friends (followers). Very Important: Vote! Around 40 times of voting within 24 hours is the limit. Then your voting power decreases. And don't forget to resteem to show your followers what you like very much.The number of your recent votes is shown here. Just put in your avatar's name in the upper left field and wait until the red countdown in the upper right is ready.
If you need help, please feel free to ask. Steemians always helping each other. Before you ask it's better to look up in the Steemit Help Net. And visit the official Steemit Welcome Page as well, where you will find all informations and a lot of links around Steemit.
Use this Steemit FAQ as well. It is a very helpful collection. Steemit development is in Beta stage. Some things may seem to be strange. Just ask!
For editors it is better to use the Markdown Styling Guide. It is an important source when you want to work in an editor without any icons. Below of every editors frame (comments and postings) you will get the Preview of your work.
Including Images in your post works perfectly. You can do it in several ways, as described in the image help.
For sophisticated alignments read my article about alignment in the editor.
RE: Hello Everyone I'm from Central America