Hey @rubenjfm
I'm @fiatht Welcome you to Steemit

First of all you have made a very good introductory post.

Firstly, to tell you Steemit is a block chain based where you can get rewards for sharing your daily life storys, photos, work, Diary game and your content such as Writing,your best day, Photography, diary games and many others.
it important for you to keep up with the achievement program post by @cryptokannon , from 1 to 6 in other to have a very successful staying here on steemit by completing these achievements you can learn how to use Steemit , like applying markdown , using wallet , use of key and all your account information. and also you will know what to do that will be beneficiary and what to avoid. you are highly welcome once again.