Hey!
Seeing as you're on 10.6, you can downgrade to 9.2 just fine and install CFW.
If you have a working browser, you can start right here: https://github.com/Plailect/Guide/wiki/Part-1-(Homebrew) and continue all the way to part 5 for the best entry point (arm9loaderhax) and Luma3DS as CFW.
Does the process in the link work for 11.0.0-33?