recent asd diagnosis

hi , im new to al this, and my son has just had a diagnosis of asd, he was diagnosed with adhd 2years ago, so i have been fighting all the usually battles since then really. Just dont know what im supposed to do??? i feel like i should be doing something with the recent asd diagnosis, or putting things in place, but i have no idea where to start?? or what help he needs?? any info would be great?