You'll need to connect your console to the internet via a wireless connection and create a Nintendo Account if you haven't got one yet (you can do this last step right now so it's ready when you get your Nintendo Switch Lite).
As Nintendo Switch Lite is dedicated to handheld play, it's a great option for those who want enjoy gaming on-the-go, playing with friends via local wireless and online multiplayer, or anyone who's considering an additional Nintendo Switch console for their household.