Hi Lucy
I work as crew for Silverjet and have been with them since the start. As with most airlines it is not necessary to have any experience with a previous airline. I myself had never worked as crew before but have always worked in customer services roles which is the most important thing. We have a mixture of people who have never flown before right up to people who have been flying for 16 years or more. There is also a good mixture of ages. I'm 29 but we have people as young as 19 and also people in their 40s so age doesn't seem to matter.
I hope I've answered all your questions.
Good luck