Welcome! Glad to have you here!! Both of those picks are great, and I would also look into Instant Shine. I would sugest starting out here:
There is A LOT of great info in this thread!
On a side note, I think it’s AWESOME that you are wanting to work with autistic children! I have a 9 year old with PDD, so I can truly aprieciate your commitment to children with speacial needs.