Permanently installing Nintendo Switch game?

It says here that I can download it for free from the eShop. But how do I do that?

In the eShop it says that the game costs 39.99 euro. If the card is inside, it doesn't say install anywhere.

Thanks for helpful answers.

Didn't you read it right? There it says that it will be available in 2020.

"not helpful": that doesn't mean…

This means that up to 3 other players can download the demo and then play it with you (only in local mode).

https://www.nintendo.de/...48086.html

Try 51 Worldwide Games for Free!

In the free demo, you can challenge up to three friends in local wireless multiplayer games. * If a player owns the full version of the game, the demo players can also try out all multiplayer games!

Think self-explanatory.

We're already in 2021!