Parents say I can't do it

For context- I'm in my early 30s, autistic with Asperger's syndrome, mild, (I am just as capable as everybody else, just need a different support system) and still living with my parents. Yes, I work and have a vehicle of my own to drive.

I want to venture out and live on my own, my own place. I'm planning to move to Florida, work, live and establish roots ( but also sick and tired of the cold) new opportunities, adventure.

I brought this up with my parents and including learning life skills. They say I can't do it, I don't have the skills and the tone is deliberate and they say they want what's best for me. But how can a parent(s) tell you they want what's for you, but then completely undermine the very daughter they adopted cause they claim they wanted to give me a better life.