You should respond very well. The issue with doing gear in your early 20's and without a solid foundation is that you shut down your natty test production doing cycles and even though you can jump start it with PCT you are pretty much screwing yourself over when your t naturally drops later in life. Basically you are shooting your wad and gear is less effective the MORE you use it. The key is too keep your cycles simple and at the least amount (low dosage) as you can. Later on you'll have to start uping the dosages significantly if you start out going crazy. Additionally, hopefully you have built up a solid foundation and your diet is already on point or close to it.. The difference can be likened to the foundation on your house. You build it on sand, it is less stable over time. Furthermore at this age you can blast (go higher on your doses and add different compounds as you gain experience) and cruise (lower your dose to a TRT dose ie 200-300mg test e or c per week) and this will clear out receptor sites while maintaining "normal" test levels. You'll feel better then you ever have with more energy and zest for life ;-)