Unashamed boasting but I thought this would be beyond me.
I can do a four string plait but 6 ???
Now I know there are a few steps missing - like all of them but I'm not setting out to give instructions and you shouldn't get dough or flour on your camera. There are videos on youtube - one of which I followed. Here's a tip - choose the shortest video! (The rule is along the lines of " take a strand from one extreme, pass it under two strands and then wrap it under and around the next one. The take the strand at the other extreme and do the same and so on"
Challah - Never been known to disappoint.