I guess that's an option too. Though I am not too sure on the details for that.
Anyways, here's a great guide on it:
Link: https://gbatemp.net/threads/tutorial-noob-friendly-nand-dumping-2ds-3ds-3ds-xl-n3ds-n3ds-xl.414498/
Edit: Actually from reading the Hardmod Downgrade section of Plailect's Guide, I think you'll still need an alternative entry point.
Link: https://github.com/Plailect/Guide/wiki/Hardmod-Downgrade
Ok, thank you so much for the help