You also might be interested in
When we train, we should strengthen the muscles of our arms & hands in both directions (extension/flexion). When we pluck or pick towards the hand, we are flexing the muscle. When strum outward, we are extending. Finger strumming is called rasgueado [to scratch or brush]. An up arrow is a down strum; a down arrow is an up strum [consistent with the tablature]. Explore your full range of motion for each finger individually.
Doublestops on the open strings. GB together. Think like those are the 3 & 2 open in tablature. Open 3 & 2 together looks like what you see above.