hi
i was in the same situation good alevels not decided whether uni or fatpl.
i deferred my uni place and decided to work normally - earn fatpl and do that.
2 years on - ive kept saving, but to be honest, a) i cant warrant spending what i have saved on learning to fly when its so volatile.
b) regret not going to uni for the qualification and the social experience.
c) hate the rest of it anyway - end up with a crap job if u aint got a degree.
my opinion is to just do uni and take a chance on flying at a later stage when you may be in a more comfortable position to do it... or .. be prepared to change your mind along the way.
its just not worth the hassle - my crap planning has caused nothing but stupid hassle and wasted time! which i regret very much.