No problem putting the ISO on a DVD.
But I suggest you only need one tutorial to build it. Sometimes trying to follow the various methods on a few sites gets confusing.
See: Windows 10 ISO Download - Windows 10 Forums
Read through the tutorial paying attention to the colored boxes
If you have any questions ask before proceeding - it can saves steps in the long run.
Follow OPTION ONE in the tutorial:
Directly Download a Windows 10 ISO from Microsoft Tech Bench
Edition: Windows 10
[ 64-bit Download ]
When the download completes,
open the folder
right click the downloaded ISO
Select Burn disc image
Follow the burn dialog
- basically make sure there's a R/W DVD in the drive
- make sure the correct drive is selected, and
press the [ Burn ] button