It helps to have someone that knows how to work a sewing machine to show you the ropes of it and it gets pretty straight forward from there.
If you're talking about handsewing, this is a fantasic site showing you a few of the basic handstiches and what they're used for.
There probebly won't be a pattern for just Noel but that's where you got to be a bit creative. Some people modify patterns or draft their own but you're in luck someone complied how they made their noel costume.
There are also other cosplay communities offsite that focus more on construction of costumes where maybe you can find more help than you might get in this thread.