That's the problem. There is no clear definition of autism. It seems you can be slightly socially averse or have any obsession(hobby.)
Being slightly socially averse or having a hobby are not signs of autism either. During the screening, you fill a questionnaire with dozens of questions on various matters and only coexistence of many factors may lead to diagnosis.
(that said, being incredibly annoyed at vagueness of these questions is kinda a hint already)
I guess enjoy is not quite right. I find following traces of a board and trying to reverse engineer its function well enough to fix it is strangely calming. Also have been known to read microcontroller datasheets like novels.
Still, while there sure are patterns in what autistic people may find calming and interesting, being autistic in non-autistic society has an imprint on most aspects of one's life. If considering the thought "I may be autistic" doesn't make you go "that would explain so many things I've been confused about in my life!", you're probably not.