Coconut fiber can be a good alternative to peat moss

for the worms, I would say to get a mixture of ants and, hopefully you live in an appropriate climate to dig up earthworms and keep them. alternatively, you can cut a section of earthworm horizontally and vertically

As for the species, most roundworms will do the trick. Hope this helps, sorry it took so long to answer. A lot of things changed man, I made that post when I was 13