Just to be crystal clear: do NOT do a dbol-only cycle.
I understand you probably want to do just dbol because it's a pill and the idea of injecting yourself with a needle seems crazy. We've all been there. But dbol-only is completely pointless, you likely won't keep ANY of the gains from a dbol-only cycle. Not to mention if you do it for too long it will damage your liver.
Your first cycle should be testosterone enanthate (or cypionate, whichever) followed by strict PCT. THEN you will keep most of your gains. You won't with dbol-only.
The bros here recommend only doing testosterone for your first cycle because if you add other shit to it and something goes wrong, you won't know if it's the testosterone or the deca or the dbol or whatever. Besides, you'll see awesome gains from just testosterone for your first cycle if you really dial in on your nutrition and get enough protein.