questions... need answers

so my wife and I are trying for the first time this month. Aunt Flow currently visiting. I have a couple more detail I was hoping to get straightened out. we are doing at home ai and we have a donor willing to donate three days in a row. my question here is should we start the day of ovulation or the day before? next question do I need to orgasm after insemination? last one pre-seed worth it or no? any answers to any questions would be greatly appreciated. thanks in advance