A:AnswerGo to this page https://www.bestbuy.com/site/video-games/nintendo-switch-oled-model/pcmcat1625579441908.c?id=pcmcat1625579441908 you should be able to put in your email for the pre-order notification. I recommend you put in multiple emails in you have it just to be on the safe side so you can be sure you can get one before scalpers.
A:AnswerMake sure you’re using the pamphlet from the original product. If you have to, take the back cover off and it will have a barcode you can scan under it for registration.
A:AnswerThis version is just the console itself. There are different versions which come as a package. (IE: Legend of Zelda tears of kingdom package)
There are a few free apps you can download from Nintendo E Store. But you should know a Nintendo online account could really unlock the potential of the device.