There is a lot of data that meditation is beneficial for people with ADHD and potentially even more so since they “need it more”. Yes it is extremely challenging which is why in my parent I stated that according to what I have read, it takes someone with ADHD potentially twice as long to see the benefits of practice in comparison to healthy controls. I have ADHD and have learned to meditate; my mind was out of control, and I feel as though I have control of it now, without stimulant medication. I encourage you to look into the data if this is something you find interesting.
I've only tried mindfulness meditation, but as others have chimed in in the thread, other types may be easier depending on your circumstance. As I started, even being able to focus for 5-10s uninterrupted by thought was a huge win. It may be slow, but eventually you will be able to extend these periods and get to a point where it's actually 'working'.
Also, I don't think using stimulants or other adhd meds (like atomoxetine), if they're part of your routine is necessarily cheating. I like to think of them as 'training wheels', which will help you focus internally and less on your thoughts. It will still be difficult (like it is even for those who don't have ADHD), but it may help your brain start shaping those neural important pathways a bit sooner and more easily than it'd otherwise come unmedicated.
