Help me understand OPKs & ovulation 🤣

Thursday 7pm was my first positive opk- I have 12-36 hours before the egg releases then another 24 hours of being fertile? so I will ovulate at the earliest Saturday at 7am to Sunday at 7am? is this correct? 🥴 help me understand! lol I am so new to this. I also had ewcm thursday at 12pm.

thursday 7pm + 12 hours minimum + 24 hours = saturday 7am (the earliest I could have ovulated)

thursday 7pm + 36 hours maximum + 24 hours =

sunday 7am (the latest I could have ovulated)