AJ1990
Like the others said, I wouldnt worry about it, I am now 49, been flying for 6 years and am an F/O with a TP operator, if anything I would say being older and starting in aviation later in life has held me back (not that its suppose to in the eyes of the law).
But as someone pointed out your not too young to win a VC etc, at 22 I was in the army and involved in the Falklands where I had the privilidge of serving with a lot of young guys average age 19 -22 doing outstanding things and who were very capable of leading by example etc. Just because your young does not make you any less of a responsible person that is capable of doing the job...you go for it, and the best of luck.