Too old ?
Too old at 26 ???
Not at all. In my groundschool at Oxford (Modular) the ages ranged from 17 to 42. The average age was 26 or 27.
Most of us are "still looking" though !.
But do cost out your plans - In the current market you may pay £ 50 to £ 70 K for the fATPL and then another £ 20 K for a type rating and then even more for line training if you have deep pockets.
Most of my contempories are NOT doing a type rating "on spec". i.e. - We might be happy to pay if there is a job on offer but not otherwise.
But - 5 months since my IR and now over 40 !. You're lucky to plan this at 26 !.
Good Luck !
D129