There are a few guides but personally, I don't think you really need a guide. Both CFW are launched the same way with the main difference. If you're using your phone or computer to send payloads, you send the Atmosphere-related payloads instead which would be either fusee or Hekate. Whether you want to use Hekate or fusee will dictate where you download your Atmosphere files. If you want to be stay vanilla, then you use fusee and download everything from the
official Atmosphere GitHub page. If you want to utilize a tool that is way more useful than fusee, then you go with Hekate and download
DeepSea which is a pre-built package of Hekate and Atmospehre. I recommend Hekate since its serves more than just as a way to boot Atmosphere. If you're using the SX Pro or Gear, you will have to convert fusee or Hekate into boot.dat which you can do using this
website.