Using CIA requires a CFW, not just homebrew though, isn't it?
And if you have CFW, well then....
Here is a tutorial that I did myself but it is in Spanish and I put the option to install it in the homebrew launcher only download the .zip you extract it and the folder inside the folder 3ds you pass it to the folder 3ds of the sd
https://www.emudesc.com/threads/como-reiniciar-los-usos-que-te-quedan-en-los-demos-3demore.637465/