Please consider giving the get and moving on. Marriage is a partnership. If one partner doesn’t want to be a partner anymore, you don’t have a marriage, you just have collective responsibilities.
One more thing. You can’t change her (and she can’t change you, though she doesn’t seem to want to. She just wants to leave) Only she can, and she’s expressed pretty clearly she isn’t interested in changing her mind or stance. So you are banging your head against a wall again and expecting a different result. That doesn’t seem to be rational.
Whether you convince her (which I doubt she wants) to go to therapy together or not, I agree with zaltzvasser that therapy is a good idea for you. And I would say that considering her religious observance a religious therapist would be good for you two if you go together, I think you can find a good therapist for yourself beyond that milieu. Hatzlacha!