“When one starts to speak Spanish, it is the result of the former months invested taking in comprehensible input “
It seems it turned up automatically, it seems it occured from night to day, one is not even self -conscious of how and why did it developed, but I will tell you something: the ability to speak fluently arises as a result of all the months we were doing active listening. This explains how trying to force ourselves to speak before our brain have processed at least the basics of the language is quite useless. It is like going into a swimming competition without being able to swim or trying to move a car without engine or oil.
I hear most people saying over and over again that the most important thing to learn to speak a language is to practice by speaking it. I agree with it to a certain extent, I would like to highlight that speaking is an automatic and natural outcome of listening and understanding since the first can´t develop without the second. It is a very simple equation : listening + understanding = speaking. They go together inextricably and one is the result of the other.
Imagine that I moved to Russia and I can´t speak russian. I live in Moscow surrounded by friendly native speakers and completely immersed in the language. I am in the perfect environment to learn speacially since I need it to survive. Do you think I would be able to speak the first, second or thirld month? It seems reasonable to assume that probably I would need to stay for a while before I start to pick up the basics of russian language, no matter how much I force myself to practice since day 1. After so much exposure to russian, I would learn it for sure.
Now imagine a second scenario: I move to Moscow but I live in a Spanish speaking environment with very little contact with russian natives. Would I manage to learn to speak it ? The anwer is not, I can spend 20 years in Russia and still only be able to utter basic sentences, as the exposure to russian language will be so little that it will not allow me to absorb the real language, to speaking it fluently.
I know this must sound so obvious to you, doesn´t it ?