If you have regular 28/29 day cycles I would start bding around CD10 and continue everday or every second day until around CD20. I did this when TTC my daughter and it worked first cycle. CD 14 is standard for a 28 day cycle but you may have a longer or shorter luteal phase.

Temping and OPK's are great, I have also conceived on my first cycle with both these methods, but I also believe it was pure luck. Temping only tells you, you have ovulated after the fact, so may take a few months to figure out when to bd.

Good luck