Wearywithteens
This is a very general overview for communication.
Instructions can cause a huge amount of misunderstanding. Remove all except the words you mean. Don't waffle. Don't insinuate. Don't hint. Don't infer. Don't be sarcastic. Don't say one thing when you really mean another. Don't use facial expressions or body language to alter the meaning of your words.
Think really, really carefully about what you are saying, concentrate on the words you will be using. Literal interpretation can be a massive problem for some people with autism in interactions with NT people.
If you say "The bin needs emptying" to an NT person they will infer from your tone that you expect them to carry out that task.
If you say "The bin needs emptying" to an autistic person, they may agree with you or ignore you because all you have done is state a fact. You have not specifically asked them to do anything about it.
Sometimes, they won't even register you were speaking specifically to them if you didn't use their name first.
"Could you empty the bin?" is also ambiguous.
As is "Name, could you empty the bin?"
You need to be more direct and straightforward.
"Name, please could you empty the bin right now?"
There are loads of videos on youtube about how difficult autistic people find the NT world. I like Purple Ella's explanations of trying to navigate the NT world as an autistic adult and parent of autistic children. There are presenters of all ages, try different ones until you find someone you can relate to.
Give single instructions only until you are sure the person can carry out two or three step instructions.
Read and watch as much as you can about how to communicate with neurodiverse people.
Emotionally, ND children and young adults can present at around two thirds of their chronological age, so in your own mind, stop thinking 'At your age you should' or 'You are old enough to know better' because very often, they may not be at all.
Read up on Social Communication, Sensory Processing, Executive Function and Processing Speed so you have an inkling of the struggles ND people have in the NT world.
Ask for autism training for your firm if that's appropriate.
Thank-you for wanting to make a difference 