New here! Same sex couple to conceive.

Hi all! I just downloaded this app today. My girlfriend and I are wanting to extend our family. We have a donor who will be here in CA this summer so we will be doing IUI at that time. Does anyone have any advice? I wanna get a jump on things now to increase my chances. I am cutting out caffeine, my weekly glass of wine, eating healthier, practicing stress relievers, and trying to incorporate more exercise into my day because my BMI is about 30 and I was told that 20-26 is the range for BMI to conceive.