You don’t so much read it like a story book, although then you get a good idea of what the entities can do… you follow the instructions to actually DO the pathworking, make contact and ask them to help you.
But before you do that I still recommend you first work on learning how to banish and cleanse. If you start working and calling entities, but get a parasite instead, you won’t know how to deal with it, and this is important if you want to stay healthy while doing magick.
Again, here is the link for the basics you need to do: you asked for this info, and you are ignoring it in favour of the flashy stuff: stop that, slow down and learn properly or yo may attract problems.