not a very constructive answer, but better thatn nothing....or maybe not!
Well, think of it this way:
I like to design apps, I know nothing about C, C++, or any other desktop language. I notice Windows looks neat, I want to write an OS, but I know nothing about writing it. Would it be easy or hard? Of course it's going to be hard. Is it possible to do? Yes, but for someone who doesn't know a lot about the language or how to write it, but it's going to take a long time and it's not going to be the caliber you'd like at first.
Hmm.... maybe that's why Windows is so long between updates/upgrades.... no-one knows what they're doing 😉
I don't think it'd be a challenge for anyone to create a mySpace or Geocities contender, but it would just take a while to create one that is of the same caliber or better. It's possible, but it would take a while.