Autism is a convenient way to label people who have similar characteristics. There is no definitive way to say that someone “has it”. The question is whether knowing you are autistic is useful.
So, is having the autism label helpful to you? Does it point you towards strategies that might make it easier for you to achieve your personal goals - whether that’s “be happier” or “make money” or whatever?
There isn’t much “help” available in the sense there might be for some conditions. If you have cancer, people will spring into action to help fight the cancer - it might not work, but there is a clear goal. If you are severely depressed, then there’s therapy, medication, safety plans, hospitals, ECT, etc. If you are autistic, there’s quite a bit of support for helping children integrate into educational settings, but much less for adults, and you have to go out of your way to find it.
Try searching the internet for autism support groups for adults in your area. This won’t change your life but it is one way to make friends.