Hi Sara
I'm 57 in a few weeks and have only just started the process of transitioning. So you're definitely not too late

I first came out to my GP who then referred me for a psyche evaluation and then on to a gender clinic.
Be prepared for a fairly long wait if you take the NHS rout. The sooner you start the process of referral the better. It's all good though, there are plenty of things to be working on while you wait.
I found by just making the first pro-active steps helped my mood greatly. I also started psychotherapy (non gender specific) which has helped a lot just having someone to talk to. This community has also been awesome!
So welcome Sara:) Sorry I can't be too specific as I've only just recently started the transition process myself. I wish you well with your journey.
Peace and love and all that good stuff,
Sadie