Congratulations to all that get through!
Alcohol certificate is much appreciated by management and HR department...so go for it!!
I think Jetstar is a good choice for anyone starting out, but I definately beleive you should use your work experience to try out for a full service airline first!
Neverless...If you do decide to join Jetstar, that is fine but do not spend too long before moving on to a full service role!!
Good luck!!