Ttc and testing

So I'm currently ttc with my partner for #1 and so far nothing which I understand. I was just wondering... I'm on a 24 day cycle and so when would be the best day to test? I'm due af in 11 days and I'm also not long out of ovulation so I don't know what's best... I've only just figured out most and we've only been trying for 3 months now so still learning. I'm taking my prenatals and watching my eating and stress and such but not sure on what else