Verb conjugation of "üben" 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.
Sorry if I did not write back, I was in Napoli during the holidays, then back at work, once again I have so much to do at the weekend, but I will do my best. Greetings from Italy. Marco.
Have I forgotten to tell you my name because you see only the usernames. I'm sorry for that. You are right the username ---- stands for Gabriel. Besides, I'm completely healthy again, thanks.