Watch the Minor 7th online guitar lesson by Frank Vignola from Next Steps Jazz: 2-5-1 Progressions
A very common grip for a 2 chord. The fingering is similar to a major 7 in that you don't want the outer two E strings to ring out but it is a little trickier because you also need to bar using your index finger to do both. The way you place your index finger is very important and may take some time to get comfortable getting your index where it needs to be. Get comfortable and move it around.