Welcome to WP! I knew almost nothing about Autism, though I had seen fragments of commercials for
Rain Man [1988] and, based upon that, would've denied being Autistic. Then in 2019 circumstances persuaded me to to investigate the issue a little more deeply...then I was officially diagnosed
Autism Spectrum Disorder, Level 1 (Mild), with a note that I also satisfy the criteria
previously associated with
Asperger's Syndrome.
The diagnosis was a
wonderful revelation! The previous six decades made so much more sense!
I can't say my diagnosis has had much
practical value, however. Two benefits come to mind:
1. Wrong Planet!
2. When my bride bumps up against a symptom related to the diagnosis, I get to say:
"I have a doctor's note for that!" 
But, nonetheless, I'm glad I found Wrong Planet and visit it often. I hope you do also.
I'm guessing my story will [and does] look much like yours, only sooner in my life. Thank you for the support!