If the guitar is live, it's a matter of proper recording technique to minimize the noise. Noise will be there in any track. The key is to get a good balance where the noise is as low as possible.
Since we're talking technical things on this thread.... I'd look at the EQ on JR's voice and pull down some of the mids. Thin it out a bit. It's in the same general area as the acoustic guitar. Maybe back off the reverb a bit and get her voice more upfront and intimate vs back in the room and verbed. The verb may be accounting for the predominance of the mids that I'm hearing. Some voices, hers, for example, don't need a lot of reverb to hide behind. Back it down until you can barely tell it's there, then go a tad further. Or.... run the track dry and put a mild dark plate on the master.

Aside from those things.... man this is really good. Great job.

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