What i did was really simple.
1 I extracted the Atmosphere files.
2 Put all the files in sd card folder on the root of your sd card
3 Use payload that is provided to boot switch into Atmosphere
4 Start choidujour and finish the firmware update (its only going to do the last steps)
5 reboot your switch and your good to go
https://1fichier.com/?ccmn5rbgrzr5d341uj0h
That is basically what i posted but yours needed more words