IUI help and advise

I have my first consultation about IUI next week how soon after consultation can you start treatment my period is due 3 weeks after consultation I would like to start then soon as.

Is there anyone that's did IUI with endometriosis I have stage 2 had laparoscopy in January iv been ttc for over 3 years with 2 losses in 2018

I ovulate on my own but still want to do medicated

Is there anything I can do to help boost like diet wise once having the IUI

Please anyone give there stories on IUI with endometriosis was it successful?