It's good to always bear in mind one's limitations and remember that this is a huge subject encompassing many areas - nobody knows all of it, nor could they. Anyway, you can read up on various parts of the issue, or if there are ones that particularly interest you, focus on just a few strands.
Asking questions is really important - we should all be asking lots of questions on topics of safeguarding, children's health, women's safety, women's rights, the law, policy, media representation, sexism, lobbying, etc. So even just saying 'we need to talk' or asking people for answers on some of the questions raised is ENORMOUSLY important.
We have successfully swept away the 'no debate' stance, which stood for years. It's still hard to raise the issues (witness Scottish police calling a woman in for questioning this week) but the more women who say they care about women's rights, the harder it is for them to try and pick off anyone mentioning 'feminism' or 'sex based rights' (both of these phrases have been called 'dog whistle transphobia', see Patrick Harvie in the Scottish parliament, for example).
It should tell you something that anyone referring to women or feminism or females or 'sex' is called transphobic.