Hello sir.
It is really amazing to see your interest in pursuing studies after such a long gap.
As per getting Admissions into a college - where few courses are provided it looks fairly difficult but you can try for a University.
But, regarding getting admission into a University as well as getting study visa even though you get an admit from university, it will totally depend on you - how you will convince Univeristy selection committee and ViSA officer respectively with following points:
1. Why study after such a big gap.
2. How this study will help you in progressing in your career ?
3. At this age, you would be well settled , why will you study now & even if you want to study why Canada? Why not pursue in your home country ?
4. How sure you are to return back from Canada after studies.
I am sure you will know more points, I tried highlighting only few , to be included in your statement of purpose to Universities and letter of explanation to VISA officer.
One thing is sure - age is never a constraint towards pursuing studies.
Good luck and it is always better to try than repenting later "I should have atleast tried"
Warm Regards