Hello, BRUNO FELIX DE SOUSA!
Looks like all the content here has been added and moderated by volunteers and learners, just like you and I. Feel free to look for more content elsewhere, if you want more content. Freecodecamp YouTube channel is an excellent source 👍.
Sololearn is not only about lessons. It's more like a social network for geeks. In fact I myself was really angry with the lessons quality. I asked my very first question here on bad grammar in one of the lessons. Then I emailed firstname.lastname@example.org about that. And the problem has been solved 😄.