Claiming benefits

Hello all.

I'm the parent of a 25 yr autistic fella.  Intelligent, can wash, dress, cook foods he likes to eat.

He finds social interaction, noise, a break in routine and is extremely ocd with clean, gets anxious.

He gets unemployment benefit presently, I had to take him to sign on.  He doesn't like they way they speak to him.

He did do an apprenticeship in IT 2 years ago.  Computers are his life basically.

Since he has moved back from his dad's to mine, 2 years ago he has been so settled and calm.  COVID put pay to seeking assistance/guidance and his ocd stops him going out.

I really need to know what else I can claim or assist him to claim and help.

Things have been suggested, unfortunately autism can be very tunnel visioned.

So any advice, help etc gratefully received please.

Thank you.