The frame and the mat matter more than the print itself. A great image in a flimsy clip frame looks like a dorm room poster, and a so so image in a proper wood frame with a wide mat looks like it belongs in a museum shop. If you only remember one thing, spend the money on the framing, not the art.
Black frames are the easiest thing to live with, by a long way. They hold their own against almost any wall color and they don't fight with other metal finishes in the room the way brass or chrome sometimes do. Natural wood, something like oak or ash, is the close second, especially in a room with a lot of warm light. White frames look clean in photos but show every scuff within a year, so I'd save those for a hallway nobody touches rather than a spot kids walk past with backpacks. For the print itself, muted and slightly faded tones age better than anything bright and saturated. A loud print feels exciting for about three months, then it's the thing you're tired of looking at.
Art prints do the most work in rooms that get used but don't get redecorated often, living rooms, bedrooms, hallways, the stretch of wall going up a staircase. A rental benefits from them more than a house does, honestly, since you can take real art with you when you move and leave the nail holes behind. They also suit a room that leans a bit plain or neutral, where furniture is doing the quiet work and the walls are the one place you're allowed to have an opinion. A sunny room full of plants can take something botanical and literal. A darker room, north facing or basement level, usually looks better with something abstract and a bit moody rather than fighting the light with a bright beach scene.
If you're starting from nothing, one larger print in a simple black or wood frame, hung at eye level over a sofa or a console table, will do more than three small ones scattered around trying to make a gallery wall happen before you're ready for one. Gallery walls are a second or third purchase, not a first one. Get one piece you actually like looking at every day, live with it for a season, then build out from there once you know what your eye keeps going back to.
This kind of art suits a home that's lived in daily and still wants a little bit of its own personality on the walls.