Training a kid with autism

My 4 year old got diagnosed with autism last summer. Thinking I wanna get him out in the garage gym to keep him active. Was gonna put him in a crossfit kids class but non of the gyms around here run classes for kids that young. I do have my level 1 and a few certs and ran the crossfit club for my military unit so I do have coaching experience. Anyone have experience training a kid with special needs. Any advice will be greatly appreciated

Thanks

Training a kid with autism