Why not join up as a Pilot in the first place? Aptitude, Fitness, Interview, Teamwork.....???
How long as a Flt Lt?
I had an LAC joined us, previously rejected for commission - she thought working as a civvie in OM would help, so she thought joining the ranks, then commissioning was a good way to go...........
So LAC rocks up at JR Commissioning Club and gets told "JOG ON!!!!!! - Get some (i.e. many years) experience first"