Ovulation coming up...when to actually have sex?

Hi there! My husband and I are ttc, going on 6 months which isn't very long I know but it seems like forever. My daughter is constantly asking when her little baby will be here to play with her...so pressures on! Haha I just ended AF today and Glow says my fertile window starts on the 17th...when should I start having sex to achieve the best results? I have taken opk and I feel like they are so sporadic. Any advice is appreciated! Thanks!