You're too young and underdeveloped to even consider the use of steroids. Let alone, oral only is a very poor choice. Oral AAS only cycles are common amongst beginners and kids because they're afraid of needles.

At this point in your development you should be studying how to properly structure your diet and training to maximize your growth. It's recommended that you reach or come close to your natural potential before using AAS. You have a long ways to go. What you gained with Dbol is mostly water retention and you will lose it not long after you quit.