Hello curiouslurker and welcome to Thunder’s Place! :D
As alivegeta advised you above. First start with the Newbie Routine and condition your penis. Take it slow and learn as much as you can about each exercise before you start.
The Newbie Routine will not only condition your penis, but will also give you gains. It is good enough that you may not even need to change it for a long time. And when it stops working, you can easily tweak it to trigger those gains back again.
Clamping is very advanced. Which does not mean advanced gains, but requires more experience, knowing how your penis responds to the exercises, when to stop and why, how everything works. More advanced is more risky.
That being said, it does not mean that you should not do advanced exercises, but just be careful and don’t jump on them right away. For clamping, I would say you need at least six months of PE experience before you consider it. And there are many things you can do before you decide to do an exercise as advanced as clamping.
The threads below are a good place to start.
START HERE ——-> NEWBIE ROUTINE <——- Important Newbie Info
Physiologic Indicators (PIs) to help growth!