Translation of by the way in German

My family is doing well except for my youngest daughter. She is a little ill and needs to visit many doctors. She has had several infections lately, but nothing dangerous, so we are not too worried.
Please correct me, if i misspelled something! Where are you living? What are you doing in your life? I hope it's okay if i correct your mistakes. I wish you could do the same for me, it will help my writing skills.
I'm writing you in English because I don't have a lot of time and writing in German will take me a long time. Just a few corrections: you can not say in English How you do, you need to say How do you do...