TTC newbie!!

Zoe
My husband and i are finally ready to try for our rainbow💚💙❤️
Our son passed away at 20 weeks in feb. 2014, so its been almost 3 years. (He was a surprise)
But were finally ready to take the next step forward to grow our family. 
I really dont want to stress over this whole journey. But i would like to get an idea of how my cycles are and see if theres an ovulation pattern. 
So i guess my questions are, what cycle days are best to take an OPK? And what cycle days should be best to BD? (I know everyone's bodies are different but what days were successful for yall?). 
Then after that how many days until a HPT