Congratulations and Enjoy your new car!!!!
My experience in Dallas County was probably not premium, but it got the job done.
Already had the car inspected, and had all my insurance card information and sale/purchase information.
I went to the closest Tax Office in Oak Cliff, visited the information desk to get everything I needed, then went to the line.
The background noise made conducting verbal communication with the lady inside the glass office somewhat daunting.
No, they did not know what a Tesla was.
Showed her a picture of the car on my cell phone, so she could see a bit.
She was very thorough, so it got registered as a five door vehicle.
You have a great car, it will get you noticed.
A LOT.
You will ample opportunities to educate people what a great car you have.