The A part here is straight forward and relatively simple. Made to lie easily under your fingers while still capturing the beauty of this great melody. The B part may be a little trickier, especially if you are not comfortable using your pinky. If not, you definitely need to work on this tune to strengthen your pinky and your comfort level with melodic style in D. Use your pinky as an anchor point in the B part, covering the 8th fret with your ring finger, and reaching back to the fifth and seventh frets with your first finger(which will lay on the side of the finger tip) and second finger. Only lift your pinky when you need to play the open G string.