For your programming question: You have to have a starting point and an ending point.
G0 X1.25 Z0.1
G71 U0.045 R0.025
G71 P101 Q102 U0. W0. F0.012
N101 G0 X0.750 (STARTING POINT X)
G1 Z0. F0.008 (STARTING POINT Z)
N102 G1 X1. Z-1.5 (ENDING POINT X AND Z)
Sadly, your problem with learning is faced by many more younger people today than older ones. I think this is due to two reasons: One is a lack of discipline at younger ages. The other is we have trained younger people to focus on what is exciting and contains movement and sounds to stimulate the senses, and reading not very stimulating. For your difficulty in learning, as with any skill, to get better, practice, practice, practice.