Does anything move you, in a good or bad way? Maybe not like a movie or something, but something beautiful like a person, art, poetry, music, sunrises? It doesn’t sound like you are very in touch with your emotions (except anger as you said) so maybe work on that first and then crying will just come naturally. Can you write down things that make you feel happy, sad, excited etc? Not sure if someone else has mentioned it to you before, but there is a book called ‘the body keeps the score’ which has a lot of stuff in in about our bodies holding memories and feelings in. It’s in us even if we don’t realise it.

Ps. I never cried as far as I can remember, until I had been in therapy for a while. I genuinely couldn’t feel anything before I started doing what I have mentioned to you here.