FWIW if you’re 18+ there is less reason to get formally diagnosed. University of Washington did a study some time ago which found self diagnosis is rarely wrong. Link to that PDF here: …washington.edu/…/Self-Diagnosed-Adult-Autism-Res…
A good way to find out is a combination of a couple tests. The RAADS-R is the most accurate known autism test, is is over 80% accurate. Here is a free one that doesn’t require registration: embrace-autism.com/raads-r/
And if you doubt you’re autistic in any way (guessing based on wanting to be diagnosed), the CAT-Q is a good test to identify camouflaged autistic traits that you’ve learned to hide. This one is also free from the same place: embrace-autism.com/cat-q/
Feel free to ask if you have questions. I’m late diagnosed myself (was over 30) and it’s a big world to navigate blindly!