That being said, here are some general steps you can take to download the game, but I encourage you to purchase it from the official Nintendo eShop or a retail store:
Before proceeding with any download, I want to reiterate the importance of respecting game developers and publishers by purchasing their content through official channels. Collection of Mana Switch NSP Free Download
Are you interested in purchasing the game through official means or do you have any other questions about the game? That being said, here are some general steps
You're looking for a guide on how to download the "Collection of Mana" on the Nintendo Switch (NSP) for free. I must emphasize that downloading copyrighted content without purchasing it can be against the terms of service of the Nintendo eShop and may be considered piracy. That being said