Firstly, SysAdmin is great for people with ADHD. It's neutral for Autism, no better or worse than other tech fields.
Secondly, what you're looking for is an entry level helpdesk type job. It'll likely pay ~$20/hr. You don't need any experience at all to land this job. You'll need to do that for 2-3 years and then you'll be ready for jr. SysAdmin. Your associates goes partway, but you'd need some certifications to get a foot in the door. The CompTIA certs are a good place to start. M365 certs are good too. Look at Microsoft 365 Certified: Enterprise Administrator Expert.
You'll want to know the basics of computing before the interview. Here's a list of things I ask, if you can give me a coherent answer on even a few, you make it past the first interview:
What are the basic components of a PC? Explain the difference between RAM and storage? What's an SSD? What's RAID? What does DHCP do? What does DNS do? What's a subnet? How does a subnet mask work? What's the difference between routing and switching? How does a MAC address work?
I have to be honest, I'd be wary of hiring a trans person, only because the people I work for are very conservative. I'd worry that the workplace would be uncomfortable for you and that you'd be happier somewhere else. That said, if you were the best candidate for the job, and actually wanted to work with us dumb rednecks, I'd hire you anyway.