Welcome George, and ditto what the others said. This is not only a frightening time for you, but bewildering as well: bucketloads of information to try and understand, and just when you think you're beginning to grasp it, someone comes along with a new piece of information or the latest research and seemingly proves it's not what you thought at all! The uncertainty of MS is hard enough to cope with, but the feeling that even the experts aren't certain is unnerving to say the least.
But little by little words like "oligodendrocyte" will become part of your lexicon *, and you'll see that, in the fog of confusion, some lights are appearing to show us the way out.
* assuming, of course, you're not already a neuroscientist.