This is a confusing part for a beginner, but once you get it, you'll be suprised at how easy it actually is. We all had the same problem figuring out when and how to change chords. Keep at it, you will get there.
"I'm sorry, for asking... but I'm 100 % new to guitar playing."
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Do NOT be sorry for asking! I, too, am very new to this endeavor and I found the lesson most helpful. When a person asks, and the members help, others who are just proverbial "flies on the wall" are listening and leaning.