Occasional Sitter for non-verbal Autistic 11 year old

I am a single father of a special needs child (non-verbal autistic). He is a loving boy and relatively easy to care for. He has occasional melt downs, but rarely last more than a few minutes. I am looking for a sitter on weekend nights so I can go to social activities for a few hours at a time. I can prepare meals beforehand. He is very curious and can get into things, so a majority of sitting is just making sure he doesn't let his curiosity get the best of him. He is 11 years old at the time of writing this and still not fully potty trained. He is semi-self sufficient in changing himself. Allergy alert - I own two cats.