Learning to fly is a hobby.
A full time joib as a (GA) flying instructor has been tried by many with few who make it a success.
If you want to become an airline pilot look towards an investment of £50,000 and five years graft.
During your FDBusiness studies you will be given experience in personal developement and advice on how to take the best decisions regarding your future by proper consideration of the options.
I suggest you occupy your time over the next couple of years in getting full value from the course and wait until you are in a better position to take a decision on your future without pre-judging it before you start.

Keep an open mind.
By the way, all the best whatever you decide - I'm in the middle of studying for a degree myself and I'm 71