When to start opks?

Victoria • 💗Mommy of 4 angels👼👼👼 and one little boy named Viktor and a little girl natalia! Pregnant with #3

Got my period 2 days ago for the 1st time in a year and 10 months! Had my son almost a year ago so that's why! When should I start OPKs? And would I record it as cd1 or whatever cycle day I stop my period?