Watch the Add Muted Plucks online guitar lesson by Vicki Genfan from Acoustic Rhythm Guitar Cookbook
When plucking, make sure you are picking out the correct bass note string. Keep your right hand as relaxed as possible. Try the muting and plucking first just with the A chord until you get familiar with this movement. As far as the fingering you use for the A chord, it's up to you as to which you prefer. Often times I look at where I'm going next to determine the best fingering for a chord – it's always a good idea to make the least amount of movement between chords. Notice when you're playing/plucking the Esus chord, that you'll be plucking strings 4 ,3 and 2. You might have played Bm7 as a bar chord, and now here's a new voicing to try. Similar to all bar chords, this one is also moveable up and down the neck. Have you played "slash' chords before? Here is your Bm7/E which means a Bm7 chord with an E in the bass.