Imagine what you can do with 6 months of boredom. That girth can be a monstrous girth once you come out of the rest period for your knee. Do read up on the
5x5x3 and the warm water discussions (I'll provide the link if you need it). You can interswitch between warm-hot water to cool/cold water to maximize the blood flow during the pumping sessions.
BathMate is definitely focused on girth.
MityVac smaller
cylinders are designed for equalizing your girth and refocus the penile shaft for length. But yes, you need to be vigilant on the pressure at all time. Wrong application of pressure will cause you to have blisters. Not fun. With the hand pump, you can easily exceed the pressure designed by the simple
cylinder pump unit alone. The hand pump will go past -10inHg without you knowing, and Blister City will be your worst enemy as it will prevent you from pumping.
As questions like your penis depends on it. This is your first journey. Be safe with your journey.