Please don’t bump.
If you can’t start DS software you can’t use any of the *miner exploits. Luma without CFW makes no sense as Luma
is the CFW. The question is:
Is there any form of boot exploit already installed on your 3DS (A9LH or B9S)?
This would make using the guide from the beginning obsolete (but give you the possibility to repair the DS mode). If you don’t have anything like that and your official firmware is ≥ 11.4 there are a no other (public) software only exploits for full system control than the *miner.
The only other options to install B9S are:
hardmod → requires good soldering skills
ntrboot → get the
R4i Gold 3DS Plus if you don’t have a compatible flashcart