Verb conjugation of "stechen" in German

Since my wife is pregnant, we must postpone the trip until tomorrow. I am back again in Poland in June and then I would be very happy to meet you. I will email the exact dates a little later.
I was born in Lima and for 14 years I have been living near Frankfurt. I am divorced and I have a little girl and an older son from my first marriage. My son is already in kindergarten.
I have learned German for one year and I would like to intensify my studies. Do not know how yet... It is very difficult at my age to start new projects in life. I am over 75, did I tell ya...