Crikey , firstly well done on your personal battle against that terrible disease
Do you have a current class 1 medical? If not this would be the first stage along the way , im 36 and just finishing the CPL/MEIR and train with mostly 20 somethings. Too old? well who knows , iv been told i am on a few occasions , i suppose its down to the type of work you want. I would be happy short haul or regional and id also like to instruct so in my mind im not.
Whatever you decide Good luck