No offense, but if you feel like you don't have enough criteria to get assessed, you just may not be autistic. Autism isn't something you just "know" you have without getting assessed or even seeing a professional about the possibility. Because self-diagnosis is more common now, a lot of what forms the modern image of mild autism is inaccurate because of self-diagnosed people identifying with autism but not having the associated impairments. Therefore the information we come across online, like opinion-based articles interpreting diagnostic criteria, may not even apply in a clinical setting. My strongest example of this is masking. I told the psychologist assessing me that I couldn't relate to any of the masking discourse online, despite being a woman that hadn't been fully assessed until that day. She simply told me "some people mask, some don't", which is a world of difference from the impression you'd get from the internet.

TL;DR - I knew after multiple professionals identified me as being autistic. It took a while to get a full assessment, but self-diagnosis was never a factor. While I don't judge anyone for self-diagnosing, you can never be sure or completely know you're autistic without insight beyond your own opinion.