I have an English assignment where I have to speak on behalf of a marginalised group, I've chosen dyslexia, as my brother is dyslexic, but I'm not sure how to exactly put it into persuasive words. Can anyone help me please? Thanks a million.
try the word "advocate":
n. A person who supports others to make their voices heard, or ideally for them to speak up for themselves.
In your case, you can say that you're an "advocate for dyslexics"