Cervix checking??

SNJ • Just to keep it blunt and not sound extremely selfish all I want to fulfill my happiness and feel important in this world is to have a baby with my fiancé, but of course I have worthless insides. :`(
So I understand you why checking your cervix you use your finger(s) but I don't really understand how to tell if its soft, hard, low, high, open, or closed. Idk if I have ever felt it feel to any difference however sometimes when the SO and I BD and when his Johnson hits up there its kinda painful. Is that mean it's in a certain position and a way of telling what its at? If so high, low, soft, hard, closed, or open?