Verb conjugation of "zusammenfassen" in German

I work as an actor in the theater. I have studied English for seven years, French and Spanish for two years. Well, my level of Spanish is too low to have a good conversation, but I understand it.
There are many mountains and lakes in our district in the central Switzerland. I'm married and we have a son named Joe, he is 2 years old. I have worked as an engineer at the Swiss Federal Railways.
First, let me thank you for your answer. And how can I support you further? I'd be very happy about it if we could both help in each other in learning Spanish. 'Tandem' learning beats all other methods.