Getting Started with TSG

Hi Nicholeen, I recently purchased the TSG Course and have read your book Parenting a House United. We really need help with our 13 yo son that we recently had tested and found out he is high functioning autistic with high IQ. He can be aggressive, manipulative, sneaky and lies quite a bit. And sadly, I've realized our parenting style has contributed to this. Things are going to change! I am working on my calmness and am trying to get my husband to see that he needs to work on this as well. My husband and son have taken a "boys trip" together to discuss how our family is going. Meanwhile, I've been working through the TSG course. When they get back, what should we implement first? Couples meeting? Introduce the 4 Basic Steps? Wait on the steps until we decide our Family Mission? I want to jump in and get started getting everyone calm and on board with TSG, but how should we proceed first. Thanks!