The mumber of crew from day 1? Ermm count them on one hand? Oh please, Virgin is known worldwide for being low paid, overworked and awful to work for. And the last few remaining from day 1 LOVE to tell you how bad it is, with quite colourful language!
Lets count the turnover in crew numbers? HUGE! Courses taking place constantly to try and catch up with the numbers that leave.
This is a smart airline. Recruit young, low pay, work hard, play hard. No incentive to make a career in pay points or decent pension. Earn the same as a new IFS or as a 19 year IFS. Result is that there is a HUGE turnover, with lots of new and keen crew to smile at passengers. Virgin wins all around.
Definitely apply, see the world, have a couple of years of fun, then get a proper job. Good luck, you will have a great time.