Originally Posted by pickpackpockpuck
that's pretty broad. you want art that's pretty minimal too? like barnett newman? just get what you like. if your whole room looks like it hews to a single theme it will probably look like it came out of a box and isn't really yours. know what I mean? try to avoid cliches too. no rothko, dali, print of guernica or starry night, etc. if you've seen it in someone else's place avoid it.
Good advice. It's easy to fall prey to this, especially at places such as Ikea where you can theoretically furnish every aspect of your home in one shot. In your case, I would suggest checking such places out for a few things, since you're not at a place in your life where everything you own needs to be top-shelf quality.
Where art is concerned, it sounds simple enough, but just buy what you like. Avoid really famous stuff, as PPPP suggested, but I don't see anything wrong with a print of something a bit more obscure, so long as you like it.
TL;DR, buy what you like and let the Tumblrs of the world inspire your choices, not dictate them.