Do you have access to a WiFi pad/tablet? Many smart phones can become a Mobile HotSpot so you can use a pad/tablet with a better keyboard.
Tell you family you have hyperacusis. That is the medical term. It is the most common struggle people with brain injuries have.
Tell them, "If you want to talk or discuss something with me, we need to step outside or into a quiet room."
You need to learn to just walk away from the noise. Or, put the foam ear plugs in if you need to be where the noise is.
The TBI Survival Guide at TBIGuide.com is great. It is 84 pages to print but a selective printing of the pertinent pages can be worthwhile.
BrainLine has a good page that is simple to read.
Lost & Found: What Brain Injury Survivors Want You to Know | BrainLine
Use the print function in the upper right so you can hand a copy to your family members.
Check out BIAA to find a local support group.
Find BIA | Brain Injury Association of America
Support groups can be a life saver.
Just know that we understand.
My best to you.