I start the 4 strand in the middle then bring it around so that the "high" strings (the next one to be braided) are on the inside. In order to get this, I braid a little extra then undo some to sort it out. I start braiding from there in order from inside to outside. There is great drawing of how to start the 8 string braid in Bruce Grant's Encyclopedia of Rawhide and Leather Braiding. Plate 47. Eight-String Square Braid Without Core. I have better luck starting it in my hands, then I put a dowel through it to tighten and finish off the braid U2, O2.
Thanks for the compliment.