Do you mean that you want to become a politician? Because that’s not what I’m doing. My degree is more focused around political structure, history, governmental systems, etc, and it’s not really anything like “How To Be A Politician For Dummies”. So if you’re into your history and your systems and structures, then by all means, study politics. If you want to be a politician, perhaps go another route (or whichever route you’re supposed to go to get into that field).
I would definitely suggest undertaking a politics major alongside another as it will expand your employability upon graduation and will also prevent you from being stuck in one field forever. You may not even enjoy that field, even if you enjoyed the learning aspect. Plus, an Arts degree is three years long, as are most as a minimum, honestly why would you not accompany that degree with another and spend one extra year studying? As opposed to completing a three year degree, and then going back and doing another three year degree. However, that is my opinion and I have no real qualifications to offer advice in that area. See someone at a university who is. They’ll be way more helpful.
As for universities, I think given what I’ve said about accompanying a politics degree, I would advise that you look into the programs run by the universities around you. Some universities may offer a better suited program of what you’d like to study over others. You’ll notice that universities specialise in certain areas in terms of graduates; for example, Perth universities usually see nurses and teachers from one, doctors and lawyers from another, engineers at another… You understand.
I recommend chasing whatever you want to learn at the levels at which you wish to learn.