hi i think you can go on working holiday visa im sure my friends girlfriend was 30 and she got one if your 30 you ok its when you hit 31, if you go on the state govenment site new south wales they should have a list of jobs in demand for that state which will give you all the information of who will assess you, ive done all my visa applications myself ive been to oz twice on 457 visa its not hard you just need to make sure you send everything you need in in one go but generally they ask you for more information if its missing, your save 3000 grand straight away, honestly its not hard plus ive done it all in 4 months, all my tests i.e ielts and my vatessess skills assessment im just waiting for results of my skills which i know ive passed then im applying for statesponsor its the quickest way to be a resident any questions please dont hesitate to ask but you must think of doing it your self its easy