Animal Crossing New Horizons – Consequences of Fainting

If you buy a second Switch, you're no longer sharing the same island. There is no cloud save transfer available for the game. There will be a data recovery service available later, but it doesn't sound like it can be used to keep an island in sync between two Switches.

Each Switch will have its own island. You can use local or online multiplayer to visit the other player's island or have them visit yours to play together on separate screens.

https://www.ign.com/wikis/animal-crossing-new-horizons/How_to_Play_Multiplayer#Local_Wireless_and_Online_Multiplayer

There are three common symbols on your DIY cards:

• Hammer: You have the materials to craft this DIY at a workbench
• Basket: You have one (or more) of these items in your pockets
• Checkmark: You have crafted this recipe at least once (Which is relevant for certain Nookmile achievements, I believe)

Additionally, the recipes will have backgrounds that match the general kind of materials you need to make them. For example:

• Green: Plants / weeds
• Brown: Wood
• Grey: Iron Nugget
• White: Other (e.g. bait / medicine)