Hi Bobdee,
Well done for taking the plunge.
As Whirly has stated eye hand coordination (and that is a lot of what flying is all about) is easiest learned early on in life.
There has been quite a bit of research into this and for instance people that start playing pianos etc find this easier when young.
There are plenty of people about that prove that even at a high age (and quite a bit over fifty for that) have learned to fly and get a ppl.
When I was a lot younger and less experienced in life I was of the opinion that everyone could learn to fly.
However a bit more seasoned and experienced now I have to admit that there are some people for whom the ability to learn to fly to a safe solostandard is not achievable.
This is not solely the case with people over fifty though it happens (may be a bit less often) with younger peeps as well.
Good luck
FD