Oscillating between high distractibility and hyperfocus rather than fluidly directing attention is essentially the core symptom of ADHD.

As someone who has inattentive-subtype ADHD, I must say that this sort of pattern can result in a great deal of loneliness. It is far better to watch the course "learning how to learn" and use something like the Pomodoro technique to explicitly decide whether to be in

- focused mode

- exploratory mode

- actually relaxing and paying attention to your relationships mode