Verb conjugation of "ersticken" in German

The current situation in Libya is really difficult. I tried to get in contact with acquaintances, but all the phones were not working. I'm really concerned about their well-being. I'll try again later.
The differences between Italian and Spanish are very small. But I see that you speak Spanish better than I speak English. It is still far from perfect, but that is already a start.
I have problems with adjectives, endings and articles. The grammar is so difficult. I am very happy to learn Spanish with you. What went wrong with the lessons? Thanks and best regards.