15 year old son recently diagnosed

Hi. As my subject box says my son has recently been diagnosed with having Autism. He's in a psychiatric hospital at the moment having been ther for about 10 weeks. At the time it was such a scary thing having to agree to your child being sectioned but now he's getting the help he needs. although I always knew there was something 'different' about my son I could never put my finger on it. The hospital describe him as having 'complex issues'. im trying to arm myself with all the help and information I can doso I'm a little bit prepared when he eventually comes home.