Translation of merriment in German

Furthermore, a certain personal relationship emerges among the users. An identification of the students with the language school is built. All this helps to study Spanish for the individual student.
My correction were added and highlighted with yellow markers and attached to this email. Tell me now if you have any questions about grammar rules, since I was a teacher 10 years ago.
Last week I was at the birthday celebration of my grandma. She is 95 years old and very healthy. I'm 33 years old. I work as an electrician, and I had my own company until last year.