I can understand. With the whole SUPER SUPER SOCIAL JUSTICE WARRIOR thing going on, especially with tumblr, it is easy for people to leap to conclusion and drag down people who are honestly good people who just aren't educated. I saw that happened to a great cartoonist and now they're too afraid to have characters who are outside of their comfort zone. Result? We lost representation of disabled and trans characters in their comics.
But good news- Actually giving disabled character a correct representation isn't that hard. It's like a man writing about a female character, a white person writing black character, a straight person writing about lgbtqia character, etc- there's so many of that. If an author keeps writing only about characters that they themselves are, then stories would be so boring.
Talking to people with your character's disability, do research isn't really hard. I did that for my character Dion who is blind. While I do have some degree of understanding/similar experience because I'm disabled, I still didn't know much because I am deaf not blind. So I went out and talked to blind people, checked out their blogs, read some articles. Best places to ask are their blogs that are dedicated to stuff about being blind because they'd be more than happy to talk about that thing. I do that with my tumblr- it's place where people can ask me questions about being deaf. It's rude to ask disabled people out of blue in somewhere like grocery store questions about being disabled. So I ask blind people online thru their blogs.
And yes I still do make mistakes here and there. We are humans. If some "super super social justice warrior" try to drag you down- just talk to that group of minority to ask for their opinion. If you realized you did make a mistake- apologize and move on. Bonus thing about talking to minority group is that they can back your word and verify that you are a good person who is still learning and unpacking your privilege (such as abled bodied privilege)
I do that for creators who create deaf character. Many of my deaf friends and I DO understand if someone makes a mistake. When that happens, I tell people "look this creator has made a mistake and apologized for it and has learned from it. I am deaf and I accept their apology." With that, people (esp super super social justice warrior) lose any good reason to keep attacking you.
Sorry for a long post! Hope that make sense?