I really wish more ADHD mental health care told you WHY things like this matter to our quality of life.
The Hyperactivity in Attention-Deficit Hyperactivity Disorder is NOT about being physically hyperactive, it's about having a "hyperactive central nervous system" because it's a form of inheritable dysautonomia. The problem with disautonomia, especially the ADHD kind, is that it makes boredom flag to your nervous system as a THREAT, triggering hyperactive and maladaptive central nervous system processes like fight or flight.
But dysautonomia kills you that way. Literally, part of the reason our average life spand increase on stimulents is that it helps manage risk-taking impulsivity that can get us killed by accident, but the other part is that stimulents can regulate a hyperactive CNS such that it is functionally (while impacted by the stimulent) NOT dysregulated anymore. And PHYSIOLOGICALLY that is essential because the physical outcomes of dysautonomia can reduce your life span by YEARS if not decades through self-perpetuating hypervigelence, endocrine disruption, and adrenal fatigue.
So when the ADHD brain goes stimulation-seeking and a doctor tells you to practice mindfulness, it feels like being told "hey go stand in a functioning boiler until you can stop thinking" rather than WHAT IT IS which is the process of re-teaching your body what is and isn't safe.
Standing outside making mindful, non-interpretive/moralized observation of the world helps your brain and body re-acclimate to the idea that absence of that frantic "busy" feeling isn't a threat or a risk to your safety, and gradually reduces the level of distress that just hanging out somewhere triggers for you.
Learning WHY this stuff was being suggested and understanding what it was actually supposed to do went a long way towards changing my relationship with my ADHD. I am FAR more functional now, far less prone to shame spirals and rejection sensitivity, hell, I can **sit physically still for near on an hour at a time** now without feeling like I'm going to crawl out of my skin.
So yeah. Go outside. Let the world narrow around you and take deep breaths until it stops feeling claustrophobic or like you need to climb walls. Learn how to let little sensations become big ones like the way the heat of the sun on your skin starts as a gentle warming and be omes a unique collection of sensory moments depending on how it lands on you. Listen for sounds under sounds and let them fade in and out as you move your focus from one sound to the next. Enjoy. Move on. Rinse and repeat.
When you no longer feel like the world is actively killing you, it's a lot easier to navigate it.