Thank you so much everyone! I will look into taking some tutorial photos of the braided and twisted styles. They are both basic braids (like braiding hair), with a slight difference in how I do them for the tight braid or the "nautical" braid.
Almost all the styles are fastened with a ribbon in the back except the really long ones. It is so hard to work with the rope if it is just looped around your neck and you are feeding the slack through the loops trying to get them just how you want it. I CAN get it around my head 6 times just looping it but it's a nightmare the get the loops looking nice. Much easier to arrange it how you want and secure the ends with ribbons- of course then you are limited to even numbers of loops. If you have a clasp in your rope you don't have this limitation because you can tie the clasp ends right into the ribbons. Plus, I didn't demo this here but you can put the bow in the front as part of the look. I also love the idea of fastening with a brooch as well but don't want to scratch the pearls- I thought maybe I could make some kind of elastic fastener that I could then clip the brooch onto without the metal touching the pearls.
This rope is not heavy at all since the pearls are only 5.5-6mm. Anything will be chokey for me if I wear it tight up on the front of my neck, but I'll deal with it if I like the look. Otherwise, I'll wear it looser. This is another nice thing about fastening with a ribbon, you can use the ribbon to extend the length in the back so it's never tighter than you want. The 8-loop style of this rope doesn't actually go all the way around my neck, but with the ribbon I can add a few inches in the back.
If you loop it several times and the long loop is heavy and starts to pull, the short loop can pull up against your neck and start to feel like it's choking you- this is ANOTHER reason to fasten with a ribbon or clip if possible, you can attach the ribbons just where you want them and they won't slip. I'll post some pictures later of what I mean.