Adie
Best suggestion is do a thorough search in the Wannabe forums, have a good read, and if you have any specific questions that haven't been asked, post in those forums. Pretty much everything has been covered at some point on Pprune, and you will be amazed at the amount of info in there. As far as getting a job is concerned, it depends on a whole range of factors from age and experience to which country you want to work in.
Sorry for the brief answer, but wanted to point you in the right direction before you posted in those forums.
Best of luck
ExO