Don't be scared of asking genuine questions.
In answer to some of your specific points, here is my own opinion:
I've always though (and please go easy) people have the right to be who they want to be etc live and let live with regards to all walks of life including trans.
Genuinely, I think most posters on this board have started with this exact philosophy. And actually still believe this. Many will basically agree that you can call yourself whatever you like, wear whatever you like, etc, and must be treated with respect/dignity. However, just as a religious Christian cannot make someone else believe in Jesus, neither can a trans activist make others believe that a trans person has actually changed their biological sex. This is the crux of the argument. So I personally will never believe that trans women are actually women, because I define womanhood by biological sex. They can be trans women. But they are distinct from not actual women (females). Because sex changes are impossible.
I now think to myself often, would a man really ever accept someone as a man if they weren't born as such? And the answer is no it seems. I genuinely don't think I know a single man that truly would. So why is it absolutely fine to completely dilute what a woman IS?
Absolutely, an excellent point. This underlines the misogyny in the whole trans activist movement. You will notice that it's always "woman" and "female" that gets re-defined. And women's biology that gets silenced. For example, it is fine to talk about "lady penises" but vaginas are being re-named "front holes."
What really started to make me feel uncomfortable was the idea of someone like Ian Huntley self IDing and wanting to be put in a female prison. This alone bro vs the dumbest and most ignorant of us realise just how dangerous this whole mess could get.
Yes. The point is NOT that anyone thinks trans women (biological males who say they are women) are rapists. AT ALL. The point is that the trans activist ideology allows basically any man to say he is a woman, and he cannot be questioned. They are falsely claiming to be trans in order to exploit the system! Which means that Ian Huntley, or people like him, could self-identify as a woman and theoretically be transferred. We have had male rapists in women's prisons.
The other question is what to do when these offenders are released. Do they get free access to women's spaces?
Is there anywhere that's a good place to start?
I am going to plug this link, as it covers a lot of ground for newbies:
www.mumsnet.com/Talk/womens_rights/3335962-Frequently-Asked-Questions-FAQs-I-have-noticed-here