When playing short shots to the green the rule of thumb is the shorter the swing and the lower one keeps the ball,less can go wrong.There is no need to make a full swing with a lob wedge when it is not necessary,this is a more difficult shot to play than a chip and run.
The choice of shot is dictated by how much green you have to play with and as the chip shot is generally played from the fringe of the green,you will normally have more green than fringe to play with.
Using your normal grip but holding slightly further down the club (1 - 2 inches) as there is more control than power required.Narrow the stance and draw your left foot back (right foot for left handers) as there is no need to create a very stable platform for this effort of swing.The ball is positioned further back in the stance with 70% of the weight favouring the front foot,this will encourage a descending blow which is key for this shot.
The swing is very similar to the putting stroke.It is a rhythmic pendulum style swing with very passive wrists.The length of the backswing and the follow through should be equal,allowing for a smoothly accelerating stroke.On the finish of the stroke the top wrist should firm (not cupped) and the clubface still aiming in the same direction.
The more green you have to play with the less loft you should have on your club.
Practice chipping with a 4 iron and you will see how little effort is required with the ball staying low to the ground.
Good luck with your practice and enjoy your golf.