OPK newbie needing help! Are any of these positive?

This is my first month ttc & using these test strips. I would have started testing earlier in my cycle but didn’t get them in the mail until CD17. The strips seem to reach peak “darkness” around 15 minutes which is confusing to me...I see mixed opinions about reading them after the 5 minute window. And I’m overall having a tough time determining what is positive and not. Are any of these positive? I’ve been testing a lot just trying to get the hang of this. I see other women’s positives and they seem so obvious. This is harder than I thought it would be!