Help with difficult behaviour of 10 year old daughter, new diagnosis

I'm mum to my 10 year old daughter recently diagnosed with Asperger's. Please can you help point me towards resources and ideas to support communicating within families without aggression and overload.

She masks and "does well" at school, but she us a "3pm-er" and her shouting and aggression at home is exhausting for me, and scares her 6 year old sister. My ability to communicate with her about this is very poor at the moment.