How do you determine position of cervix?

Sara

So we’re officially trying to conceive our rainbow baby. It has definitely been challenging at times. But some women are able to determine if their cervix is open, its position and information like that. I’m new to fully TTC. Meaning we’ve had unprotected sex for years, and I’ve logged my periods but never took OPK’s. I’m just wondering if some would be kind enough to explain how to gather such information. Any tips, advice or explanations would be SO GREATLY APPRECIATED. Please?

This is all the info I have so far. To me it makes no sense.