Rentry.org Switch guide is pretty straightforward, but doesn't really go too much into details.
NH Switch guide, however, is pretty detailed but doesn't mention updating sigpatches anywhere, which is required for game backups to work.
Just re-read what I've posted
here and you should be good. (I've updated the post with the links to make it a bit easier for you.)
They should work after update, but there's always a chance that one or two will stop working. Check
here if you run into problems.
As
@Dust2dust said, better stick to doing it manually unless you know what you're doing. It'll be much easier for you to troubleshoot issues in the future should I run into one.