Please take a look at the following websites:
www.nhs.uk/autism-and-everyday-life/help-for-families/
https://www.mind.org.uk/mental-health-of-people-with-autism/
www.mayoclinic.org/diseases-conditions/autism-spectrum-disorder/symptoms-causes
https://www.childautism.org.uk/
https://www.bower-grove.kent.sch.uk/parent-support-group