Currently there is no “protocol” as such to treat this condition as we’re not really sure what exactly the condition is on a molecular level.
While people have experimented with various substances, one man’s poison has been another man’s medicine and as such, it is important to exercise caution with regards to what treatment if any you decide to pursue. Things can always get worse.
That being said, bearing in mind that you have very low testosterone, if I were in your position, I would consider trying TRT. The reason being that there is a small possibility you don’t have PFS and just hypogonadism, which although unpleasant, is treatable. Also even with PFS, anecdotal experiences indicate that people tend to do better on a certain level of Testosterone.