Whenever I use homebrew launcher to try to launch the install for Luma3ds, I get a Black top screen and red bottom screen and t hen it freezes.
You're out of luck. You have to be on 9.2 to set up CFW. To get to 9.2 from 11.2, you need another system with CFW or get a hardmod on your system. It's not that easy to get CFW on 11.2.11.2 o3ds