I recommend writing down everything you can think of that you might want to talk about. Sensory issues you struggle with, stims that help you, special interests you enjoy, social difficulties - anything you can think of when you’re not sitting in front of a stranger. Then, when you’re at the appointment, if your mind goes blank (like mine often does), you’ll have the info ready to go.

I also agree with the person who said to try to not have your dad in the room the whole time at all the appointments so they have a chance to see you in other contexts.

Good luck! It’s going to be fine!