It sounds to me that you're not on the right level with your benefits, and you're in the actively seeking work camp when you should be in the working towards work or unable to work group. It also gives you a bit more money.
Things to do:
Speak to your work coach. Write down what you've told us and ask to speak to a disability adviser.
Apply for PIP. They don't look at your children here, it's about your everyday needs and what you need help with. I've recently had a chat with a friend of mine who had the same thoughts and I pointed out to him that he and his son live with his parents and at supported, so social services will not be interested.
If you have a local volunteering service, look at what they offer - my autistic son has been teaching digital skills, such as how to use a smart phone or tablet. The service also offers basic computer skills courses. It's a small group and quiet environment. He's currently not able to work but is working towards it.
I'm also autistic with adhd. I love tech though and have a job in quality assurance. Lots of these sort of roles are wfh with minimal interaction with humans. If you can get your basic computer skills sorted, it's normal to learn different software packages when training for a role.
You have so many skills you've not tapped into yet, but they're there; attention to detail, hyper focus on a task, able to see a bigger picture, that strong sense of justice when something isn't right are just a few examples.