Mild Intellectual Disability

Good morning ladies! Has anyone’s child been diagnosed with mild intellectual disability?
The psychiatrist at my sons school diagnosed him with it. He is 8 years old. I was just wondering how your experience is with the diagnosis and how you deal with mental breakdowns when he doesn’t get something?
If I tell him to clean his room or even simple tasks like telling him to get ready for school, he throws a fit for a simplest things.
I’m also having a hard time with my fiancé dealing with him as he thinks he just doesn’t want to listen but really it’s the MID.

Thanks in advance! 😊