Here is a good video for you to watch on how to safely run a dbol only steroid cycle:
https://www.youtube.com/watch?v=5DBrylerLxA
With your cycle, you want to run an AI to keep estrogen in the low-normal range. The SERM nolvadex should be used in your PCT, NOT on cycle. Dbol is a liver toxic oral steroid so using a liver aid while running it is also a really good idea.
A sample dbol cycle would look like this:
Weeks 1 - 8
Dbol or Tbol 50mg/day
Aromasin 10mg every other day or arimidex 0.5mg every other day
A good natural liver aid supplement like N2guard - 1 serving/day
A good natural testosterone booster like HCGenerate - 1 serving/day
After the cycle, it's important to run a proper mini PCT.
4 weeks of the following:
clomid at 25mg/day
nolvadex at 20mg/day
A good natural liver aid supplement like N2guard - 1 serving/day
A good natural testosterone booster like HCGenerate ES - 1 serving/day