How often to test ovulation with OPKs?

I recently got off the HBC and have been using ovulation strips to test for ovulation. So far Ive ovulated once (early Jan) since I came off of HBC in Sept 2024. Just not sure how often to test, according to premom app my levels are still quite low..

I have very little CM and have had scant EWCM. We want to start trying but not sure if we should wait or not?!