" By the time I go to Uni and get the money"
How do you propose to get the money, when I was at Uni I came away with hugh debts just like everyone else. Are you aware that you will probably need in excess of £50,000 together with living expenses (food, rent, gas, electric, car, insurance, tax, books...)
....and nowadays everyone makes you pay for a type rating when you finish, thats another £20,000.
Don't know too many people that came away from Uni with that sort of money in their pocket, but maybe I drank to much booze!
No age limit, I have friends in their 40s who trained & got jobs.