You certainly can, and your first cycle should really be only test. I would not take it for the boost in sex drive, etc though as you may find when your cycle and PCT come to end it takes a hit (even sometimes whole you are on cycle if you mismanage your estrogen levels)
Cabergoline can make you a perverted fiend... Even without test injections. Dopamine agonist. However use caution as to length of use as it downregulates your natural dopamine.