Is it normal to feel restless or like I am doing it wrong when I meditate with ADHD?

Completely normal. Restlessness and a wandering mind are features of how the ADHD brain works, not evidence that you are failing at meditation. The practice is not to sit perfectly still or empty your mind, it is to notice when attention drifts and gently bring it back, again and again. You can fidget, move, or keep sessions short. StillMind offers shorter, guided practices suited to a restless mind, so meditation feels doable rather than like one more thing you are getting wrong.