Carers of severely non verbal autistic young adults

Hi

I am possibly going to care for a 19 year old young lady with severe Autism. 

My own son aged 12 is going through the process of being diagnosed (highly likely that he is)and possibly ADHD so I have knowledge to a certain extent.

Are there any carers on this page that can give me any advice, this particular young lady can pull hair etc when highly anxious.  Mum is looking for 1;1 care 3 days a week of which I am very interested in and would like to find out as much as I can to help.  I am possibly going to be working alongside another carer and the mum to begin with until the daughter gets to know me and vice versa.  She has had a behaviour plan drawn up recently after lots of change in the last year.

I have never been a carer before although used to be a childminder, the young lady is non verbal and uses an app. 

Are there any carers of autistic adults support groups about ?

Thank you