Running it on its own won't do too much for you. At most, you will get quite a boost in the bedroom, but in terms of bodybuilding you will barely notice anything. The thing is that proviron is like a turbo-booster for other steroids, but itself Proviron does not do much. In any case, it is a good compound to run because it is rather safe, and it has minimal suppression.
It is not liver toxic, and it does not raise estrogen levels, so there is no need for ancillaries with it. You will just need to run a mild PCT after using it with a good natural testosterone booster, such as N2Generate ES.
As for the dosages 50 mgs per day for 8 weeks seems like a good place to start from.