I would recommend Marker Learning. They are very thorough and we were very pleased with them.
We also were referred to an ADHD coach by a friend of a friend and that’s been a big help too. We did it a little differently as we started with the ADHD Coach and then did testing. It ended up working really well that way as we had it in place and shared the results with her. She was still able to work with my daughter (and later my son but that was different) and start to get her “going” on things before we had the tests back. If you would the ADHD coaches information now or just to have, just pm me and I will pass it along. I think this site prefers we PM then post it here. Good luck! Stay strong!

We were also worried about what that looked like with our son. Those years can be daunting. We’ve use an ADHD coach and she too always says to celebrate the small wins! Coaching is a piece of it but not the only piece ofc. Patience is key too. And self care! Helps with the patience. lol We were desperate to find a “coach” (not just any “coach”) and see what it was like. Fortunately someone referred us to one and she’s been amazing. I referred her to someone else too and they said it’s made a big difference for them. Everyone is different of course. I’m happy to pass her information along to you. You can private message me - I think that’s how they prefer on here when it comes to personal information. Good luck and stay strong!