Sorry, but there is effectively NO HANDHOLDING with Tesla. You have to be a Big Boy or Big Girl to own one.
If you want to test drive a new Model S, you'll just have to wait. Period. They don't really even exist yet. Get over it--either buy the car, or simply defer your order until you have a chance to drive one. It's not the end of the world, but I'll probably wait to test drive one too; we'll see. This Model S will be our 10th, but this is a big change compared to the 2013 thru 2020's we've owned.
As for the general lack of answers, and/or wrong answers, well, it's par for the course.
It's generally an outstanding product, assuming they'll build yours correctly. If not, for many issues there IS mobile service, something far, far better than anything Lexus, BMW or MBZ have ever offered . . . .
The best part is that buying one helps leave a usable planet for others. I don't think any other brand can claim that as their EV sales just allow them more credits to sell carbon-dumping ICE garbage.