Personally I don't orgasm from penetration (or didn't with ex...) but clitoral stimulation works pretty much every time.
Then I get the urge for penetration.
Ex was always good at doing me first. Shame about the rest.
I am quite sensitive and I don't need vibrators at all.
But it's all in the mind. Just having certain thoughts makes me almost orgasm.
And if I'm not in the right mood nothing works.
Maybe you need to explore your head rather than your genitals?