@ HNS131
Hi, You Can attend an OD/AD/FI if you have six months to go to your 21st birthday; So July 2013 is your earliest. I am currently 20 years of age and managed to go through the FI; still waiting.
@ Tatiana J
You should fill the online application and just register (you wont lose anything). Get your CV, and the pictures. Hope you do good! goodluck
Cheers
RS