How do I read this?

Hi guys,

I’m new to tracking BBT and as you can see only been doing this for about a week.

I’ve read some of the articles about BBT but I’m still not 100% clear on what kind of pattern to look out for? I have PCOS and also ovarian cysts so wanted to do this to understand my cycle better and understand around when in my cycle I ovulate to try and make sure that’s happening and at the moment my cycles are between 50-70 days so I know I’m going to need to do this quite a while to start seeing anything repetitive.

The ovulation prediction on the shot below are what glow gave me off my last period but because my cycles vary so much I don’t go by it at the moment.

Any advice on how best to use this and especially if you have irregular cycles like me, PCOS etc, did it help reassure you that you’re ovulating or am I wasting my time?