What are the main differences between ADHD and Autism?

I was diagnosed with bpd and then told i actually have adhd. i relate to autistic women so much more and i don’t want to waste my time getting a diagnosis if its actually just adhd as i have no health insurance. Everything online is like “symptoms” in children and i am 20 years old 😐.

can i easily figure out what’s more likely without having to pay someone 😀 thanks in advance.