Yes, it is grammatically correct.
You need to ask, "DOES this sound natural?" (Or, IS this a natural way to say it?) I would not recommend asking, Is this natural? as we often use that when asking about very strange habits! Ha! For example, "My friend likes to sleep upside down hanging from a tree like a bat. Is this natural?"
So that why I'd either ask, DOES this sound natural? Or, IS this a natural way of saying it.
And as the other person says - don't forget the CAPITAL E. English. And Portuguese for your language. Capitals! All languages and countries deserve capitals!