Never got a clear positive?...opk test help?

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Okay so the third to the last one was yesterday’s opk test and the last two from today. Does it look like even tho it’s not a clear positive I could consider yesterday’s test a positive? I hear some women never get actual positives. And bc today’s was lighter, does that mean that I already ovulated bc the “surge” is over? This is my first month actually being committed to opk tests so I’m fairly new to it. If you guys have any tips on how to take opks correctly please share. Also the past 4 days I’ve been taking my tests at 8pm. Every 24 hours but today I decided to test a second time at 10pm which is the lightest.