Hello.

The eligibility criteria for enrolling oneself into airforce is that the candidate must be between 16-19 years of age and should have a 10+2 degree with physics and mathematics compulsory. So you can join airforce after diploma as an "airmen" if you have 50% percentage are qualify the age criteria. For more information on it please visit the link given below:-

https://www.careers360.com/careers/articles/how-to-join-the-indian-air-force-after-12th-counar