Lens and resolution on D3200 - limits???

Andy, your 18-55 lens is just fine to get you started.  For the money, the 50mm 1.8 and the 35mm 1.8 lenses will give you very good results and that "out-of-focus" area you desire.  The 24MP sensor of the D3200 does demand attention to technique, however.  Just start making images, and you'll soon discover the beautiful capabilities of the D3200.

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Photograph—a 1/125 second slice of time that is able to store decades of memories.