HELP ME AND MY HUSBAND ARE TRYING SELF INSEMINATION?

and we dont know what are the right tequnicues to do it please if you are reading this please help us. we have been married for 4 years and are recently trying to start a family but he has medical issues to where he cant ejaculate in me but can do it by masterbating. and the only way i can insert is by sitting on a toilet. please help.