My sister is ten years old right now so my parents don't think she should have full responsibility, especially with feeding (they don't want her getting bitten). I'll let her have more responsibility as she gets older and more experienced.
[doublepost=1555330278,1555330123][/doublepost]I've been looking into Antaresias and Woma Pythons fairly extensively and I'm leaning toward the latter, since they're on the smaller side.
My daughter got a Maci for her 6th birthday, she does everything for it, she's waiting assessment for asd and adhd, but being neuro diverse can be a benefit as routine and order is big for most with autism. My advice as a parent to a few kids with autism is to make them 100% responsible, be there every single time to help, guide, and supervise but part of owning a pet is being responsible for it.
We chose a Maci for our daughter as it grows to a sensible handling size for her, not too big that she would be scared to hold it when an adult, she got a hatchling so she got used to handling it, cleaning the tank, and feeding it from a size that wouldn't hurt if bitten, and shes only been bitten once since June, and handled it fine. Dad is always with her when shes handling it and supervises feeds. She had two options when we went to buy it and she got to choose which one she wanted and the person was great and she got to have a hold and decided she really really needed it that day.
Another option to look at is a Lizard, our son got a Blue Tongue Lizard for his 10th birthday, he researched them first, he has level 2 austism, adhd, spd, and a few other comorbidies, sometimes he needs reminded to feed the lizard but it's been his sole responsibility from the day he bought it.
My advice is to take your time, make sure this isn't a passing interest, our daughter was watching snake tv on YouTube every chance she got and really wanted a Ball python till we explained why that wasn't possible, we got nagged for a snake as she needed one apparently so we told her if she researches what a snake needs and is still wanting one then her birthday present would be a snake, that was 7m away, her interest just increased, she became hyper focused on snakes, it was her obsession, so we knew it wasn't just a passing thing. Also buy a hatchling let them both grow together.
Goodluck, reptiles are fantastic for neuro diverse people