First Response OPK tests

Brandi • 23 year old mother of one beautiful 4 year old girl. Married to my best friend, and expecting our second :)
So I am tracking my ovulation this month for the first time using these tests. When you have a positive LH surge at what point do you BD? So I wait a day or start immediately? Anyone have success using these vs charting temps? Any advice will help. I am very new to this! Baby dust to all!!