If everyone that answered ever had a reason to give up on themselves, it should be me!
I am a young 67 yr old Trans Female. Married with 2 children and 12 Grandkids. ( I know, I kept them all out of Sex Ed. and biology classes !) ROFL.
I have been on HRT for about 6 yrs, my face looks about 10yrs younger, my fat is still relocating I have 40 C breasts ! ( so far without any plastic surgery ).
I too wondered how much better I would of looked had I started 30 or more yrs before I did. But at least I feel more at peace than I did 30 yrs ago.
My shortened answer is …. You are never too old, unless you have been called to Heaven.