There's a website for the Marshall Protocol with a lot of information. You can join the forum and ask questions, if you like.
A young very bright lady who had chronic fatigue started a site called bacteriality (I think, I'll have to get the link). She writes articles about the Marshall protocol that are easy to understand.
I did the complete avoidance of Vitamin D for several months, but wasn't willing to take the antibiotics because of being allergic to penicillin at a young age and then getting sick from other antibiotics (and actually any medicine). They said if you didn't do the antibiotics you would never get better. I didn't believe them, and I did get better without them.
There's a lot to learn from Dr. Marshall, but I wouldn't do the protocol. I don't take any medicine, though, so if you need to get off a medicine with dangerous side effects, it could be worthwhile.