Overwhelmed by options

I'm very interested in BBT guided contraconception and have read up on this sub but feel overwhelmed by it all.

I have a steady cycle of + - 31 days, my period lasts 3 days. I currently use Flo but it hasnt been great in predicting my ovulation (i notice it by discharge and sex drive). Samsung health has been better at it. I dont work shifts and somewhat of a regular sleep schedule

Im not sexually active but am getting married this fall (so i have time to make the algorithm get to know me). We want to wait with kids. My friend recommended Oura, but im reading mixed reviews. Also about Tempdrop and Natural Cycle.

My friend uses Daysy but shes not happy about it because she forgets to take her temp first thing in the morning. I 100% know this will happen to me too so thats why i prefer a ring of band to take my temp for me.

The idea is to have a as accurate possible prediction of my ovulation and use condoms on those days. Can anyone share some insights on how they handled it?

EDIT: my religion doesnt prohibit me from using condoms