EP
Glad to see you're set on flying dark blue!
The guys have covered pretty much everything, but... The pilot branch is very very competetive. Give yourself the best chance by knowing the FAA inside out, the website is perfect fo that.
Whilst the timescale should you fail the AIB is a year, you can take the aptitude tests twice if you don't do that well the first time. They are very good at what they do... and difficult to prepare for!... but suggest you really get stuck into some quick mental maths probs to give yourself the upper hand!
Really push your ACLO for the Special Flying Award, it's great fun and as the guys say, ITS FREE!
Best of luck,
AL