The report is in your hands. Some parents feel relief, some grief, most feel both at once, and almost everyone feels overloaded. You will read the same page five times this month. That is normal.
Nothing changed about your child on the day the report arrived. What changed is that doors open: Retraite Québec, the federal Disability Tax Credit, CLSC services, daycare support measures, and later the plan d'intervention at school. Most of it has to be asked for, in a particular order, with particular forms. That is what the First 100 Days sequence is for.
One rule for this month: your own regulation comes first. A steady parent is the single most useful thing an autistic child can have. Start there, then the paperwork.