How do you get mods for Breath of the Wild
Solution 1:
You will have to install homebrew on your switch. (Against Nintendo's Terms Of Service) I myself would rather not go into detail about hacking a switch but if you look, You can find guide's on the topic. I'm not saying I recommend modding your switch. But it is an option.
After that, you probably will have to install some homebrew applications and install the mods!
-- again I do not recommend doing this.