I'd suggest continuing with the hypnobirthing prep to allow you to calm your mind and body, and maintain control of your decisions and responses.
Once it's medicalised, even if it's your decision, you have ceded control and things are done to you. Obviously if and when this is necessary, you have to go with that, but if you can avoid it I would.
Practice how you will stay calm, cope and beleive you can.
Know what your red lines are and when you will agree to intervention, but know that it will be your decision at each step.
I don't mean to make it sound easy, it needs prep, belief and a determination to give it a go, but if you can do it, a vaginal birth can be amazing, and you'll be amazed at what you can do.
I had a very traumatic and medicalised first birth, I was very scared the second time around and prepped with hypnobirtjing, I didn't know if I could do it, but I wanted to try.
It was one of the best experiences f my life. I would never have believed I cuold stay so calm and cope so well (I'm not brave) but I did, and I hate to use the word , but it WAS Empowering.
I know this is just my experience, and if necessary you have to go with the C section, but I just wanted to say, I'm sure you are tougher than you believe right now,.