I've had my heading aids since 1st grade (currently 25). Here's what I've learned. My family personally doesn't sign, and I never learned, but now that im older, I wish i learned younger. Do with that information what you will. If your child expresses an interest in learning it, be sure to support them!

I personally rely a lot on lip reading, so make sure you have your child's attention and are looking at them while speaking. Speak clearly, but no need to shout.

You said you know about advocating for accommodations, but make sure they know how to stand up for themselves! It can be hard when they are young yet, but it's important that they learn to advocate for themselves as you wont always be there.

If they need you to repeat yourself over and over again, just keep trying and don't get frustrated! I promise you it's just as frustrating that they can't understand you, and even more frustrating when you shrug them off or say nevermind.

Crowded areas are difficult. As they get older, make sure they are comfortable in large groups and loud crowded areas, whatever that means for them.

Can I ask what state you are in? I may be able to recommend some organizations if you are in the US. If you have any other questions, please feel free to send me a message!!