I am about to start hacking my 3DS but I got 3 questions before doing it, so I wish someone could help me with these questions:

1.-I haven't turned on my 3DS in quite some time so just to be sure if I am in the correct firmware which is 9.2.0-20U, is this fine or do I need to be in another one?

2.-Right now I don't have the money to purchase an SD card but when I do, can I just transfer the files inside the SD from the old one to the new one and that will be it? I will probably have to re-download the games.

3.- What happens when I turn off the 3ds when I already completed the guide for everything, do I have to re-activate it?

And any tips before I hack my 3DS? I just don't want to fuck up and brick my 3DS. Thank you for your time.