It is simple just click on this link and then do the setup just chose the device you are using and download it then log in that’s it all.

Windows: https://discord.com/api/download/canary?platform=win

Mac: https://discord.com/api/download/canary?platform=osx

Linux: https://discord.com/api/download/canary?platform=linux

Linux tar.gz: https://discord.com/api/download/canary?platform=linux&format=tar.gz

The Support Page: https://support.discord.com/hc/en-us/articles/360035675191-Desktop-PTB-and-Canary-Clients