Follow the chords.
Or don’t. But it will sound better.
In the last lesson you stayed on A the whole time. It worked because A is always safe — the tonic is always in.
But the progression has three different chords: A7, D7, and E7. And here’s a simple idea — each chord is named after a note. That note is the root of the chord. If you can play A over an A7 chord, you must be able to play a D over a D7 and an E over an E7, right? Right.
Hit play and watch the fretboard. The highlighted notes change as the chords change. Try landing on the root of each chord as it arrives — or don’t, A will always work. But notice the difference in feel when you do.
You already know where A lives. D and E are spread across the neck too — more positions than you might expect. Don’t try to memorise all of them at once. Pick a comfortable spot on the neck, find the D and E notes near your hand, and work with those.