I think Will's answer is really solid, but I can add. I facilitate this game often and even for money as a Pro-GM. The facilitator is important for new players, especially ones who are not used to having player agency because some players have never felt like they could just declare their actions-- there has always been a referee to say yes or no or roll me dice.
I like that Will framed it as a director role because that's definitely what it feels like. I encourage investigators to split up and give ghosts ideas on how to do that too. I talk about pacing behind the scenes because ghosts like withholding their secrets and trying to get Frights identified first before divulging who they are. So there's some coaching on being more explicit.
I give safety reminders if folks start pushing boundaries, or check in w the group about content I'm not sure everyone will consent to. I ask investigators if the ghosts just discovered their Frights and if yes, to verbalize it so it can be noted.
And yes, there is downtime where you are just observing the game. It's hugely entertaining to watch/listen to. It's like having your friends do a play for you. As someone who doesnt always have the spoons to be on camera and facilitate a more hands-on game, it's a nice change of pace. And I love emoji reacting to everything that's going on, especially w the custom emotes that come with the game.
Hope that helps!
Ps. I have ADHD too and through experience I've pre-written instructions to dish out as the game progresses so it's one less thing to worry about.