1) By "this" I'm assuming you mean the plugin, and yes it works.I looked over the guide and wow! I needed something step by step and with pictures lol (I know sounds like I am in preschool). But I do have a few questions:
Will this work with my Japanese 3DS? I don't want to start it and then ruin it because it was meant for English.
If I add this CFW will it allow me to install ROMs?
And right now with ninjhax (on my Japanese 3DS) I can backup the save of my AC:NL NTSC retail card and my Japanese digital download one. Will I still be able to do that so I can fix my grass?
I am sorry for all the questions but I do appreciate your help and patience. If the answer is yes to all these then I will do it this weekend so I can use this AC plugin.
2) Yes CFW allows you to install ROMs.
3) Yes you can still backup the save files.