Welcome to the world of electrics.
Once you get your car, you should be able to use the app on the phone to look and manipulate some of the features on the car. You should probably set the max charge down to 80-90% as one of the first steps once you get home. This can be done on the car or the phone.
Driving the car is a little different, not that you have to learn to drive different, but because you have to do so much less. The main things that you will want to be familiar with when driving off the lot is how to put in forward and reverse. You might as well ask how to turn off the car, so you know what to do when you get home. The biggest difference for many people is the regen, basically you will find that you don't coast in the car, if you let your foot off of the accelerator, you will slow down. It takes a few days to get used to, but it is easy to do. It keeps you from having to use the brakes as often.
110V may be all you need anyway, it depends on your commute. So you don't necessarily need to fret about getting the plug installed. Also, check PlugShare.com for chargers. The car will come with the J-1772 adapter, so you can use these as well as Tesla chargers. The J-1772 and Tesla destination chargers will charge a empty battery in 4+ hours, while a Supercharger will go from about 0 to 75% in an hour.
As to a spare. When was the last time that you had a flat? If you do get one, Tesla roadside service should take care of you. There definitely is a little apprehension, but I've been driving without a spare for about 4 years now and haven't needed one in probably 15 years. My wife needed one about 5 years ago, but that's about it for modern history. Spare tires generally just get confused when you are rotating tires.
While all the negatives on the forums are generally true, remember that they tend to represent a very small percentage of owners. So take them all with a grain of salt on top of the margarita that you should enjoy while waiting to get home and play with your car. I too am on a trip and have had only 1 day in the last 3 weeks with my car.