Welcome to Wrong Planet. Glad to see another elder here. I just started posting about a year ago when I figured out I had autism. I was afraid it would all be young people, but there are a number of us who have been around more than a few decades. I used some of the online tests. WP has some links posted on a sticky. Like you, I found this forum a real relief, finding others who were as weird as I am. Some people will tell you you must get an official diagnosis, but not to participate in this forum, you don't.
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The river is the melody
And sky is the refrain - Gordon Lightfoot