You can check this thread: https://gbatemp.net/threads/source-release-reinand-n3ds-cfw.394309/Ahhh thank you so much, but now I'm at the part where I first boot reinand, but it just gets stuck (freezes) at the reinand splash screen (with the girl on it).
Unfortunately, I don't have any experience with ReiNand. Someone frequenting that thread ought to be able to help you troubleshoot any ReiNand issues you experience.