The first thing you should know is that Tesla does not do any type of pre-delivery communication. They won't contact you until your car is on the delivery truck and you can't contact them at any stage. You can chat all you want with those salespeople you met but they don't have access to Tesla's system. It's not really a problem but it's shocking if you don't know to expect it.
Second, they usually deliver to the US in the last week of each quarter. Expect the "November" estimate to evolve well into December. They almost never miss the end of year though, so you can be pretty sure to get your car in December.
The price will probably go up between now and December - certainly if the tax credit is reinstated, but Tesla will keep your original price. Unless the price goes down, then they'll adjust accordingly. It's a win-win for you.
The delivery date estimate on your account page will jump around all the time, it will change formats and sometimes disappear altogether. Pay no attention. It means nothing.
You can't do anything "off-menu". You order accessories from their online store. You make service appointments thru the app after taking delivery. That's it. Don't try to get them to deliver it with a garage opener or winter tires or whatever - they can't. If you can't click on it, it can't be done.
The charger it comes with can be
nicely wall mounted and is perfectly well suited to home charging on a 30-50A circuit. All you need is a
pigtail to match your outlet. You don't need to keep the charger in the car as you'll never find a suitable outlet on the road. All you need is the included J1772 adapter in case a proper Tesla charger isn't nearby. But you might want to take the charger with you to other houses (parents, cabin, Airbnb, etc.) so you might consider the
Wall Connector - the installation is a little cheaper than an outlet since it doesn't require a GFCI, outlet, box, or pigtail so it may only cost $300 more than an outlet rather than the $500 it appears to at first glance.
Sell your old car as soon as you can. The market is insane right now! Put your VIN into Carvana, Carmax and CarbuyerUSA for instant quotes. They're all competing for inventory and paying well above market value. Who knows how long this will last. You can also trade in with Tesla but your offer will expire before delivery so you'll need to redo it. Note that some states will fine you if you don't trade in with the same dealer you're buying from.
Your car will be a 2022 model year and will be almost identical to the 2021's. It'll come with a suitable USB drive for music, sentry, dashcam, and boombox and it will have a new "bluetooth" TPMS sensors that are not yet commonplace - important to know in case you get a set of winter or track wheels.
The car will arrive with some assembly issues since they don't do a traditional "dealer prep" so expect to have it serviced right away and then hopefully never again. Congrats and enjoy!