On part 3 there should be a hb_launcher_loader.cia for download. Install that then you can launch homebrew from your home menu. Be aware that is broken on 11.1.
Also on part 3 there should be a link for Luma updater. Or you can just download the newest one and replace your arm9loaderhax.bin.
So the only file I need to replace to update Luma3DS is arm9loaderhax.bin? What about the "3ds\Luma3DS" folder or the Luma3DS.dat file?
Also, the Homebrew Launcher page seems to only have .bin versions of the launcher, not sure how I am supposed to use those, they don't seem to have a CIA version.
They also ask if I want a "otherapp" or "ropbin" version, and I can't tell the difference is.