I feel like acting differently sometimes and pretend to be an older non-American.
Is there any reason behind that?
I want to get an australian citizenship because I love it
It is wrong to lie to people. It is not appropriate to pretend to be something you are not.
It makes me be able to do in my country all stuff that I'm not allowed to do.
I get that it opens up new possibilities for you. But lying about something like that could get you in trouble with the law. You can end up doing more harm than good.