It takes hours to download the Win10 ISO if you're on DSL and still quite a while even if you have a cable modem. It is not at all unusual for the early phase to sit at 0% for quite a while because of the overall size of the download; it takes a while for it to reach 1% and onward.
If you don't like the Media Creation Tool you can also try the Windows ISO Downloader available at MajorGeeks.
In either case, it's going to take a while - hours - to download the ISO if you're on DSL.
Brian AKA Bri the Tech Guy (my website address is in my profile) Windows 10 Home, 64-bit, Version 1709, Build 16299
Here is a test to find out whether your mission in life is complete. If you’re alive, it isn’t.
~ Lauren Bacall