Do you guys believe that it is possible to train oneself to break certain habits and gain virtues? if so, explain why. if not, explain as well.

Habits can be broken and formed, it just takes dedication and good idea of your goal

virtures are your moral standards
an example of a virture is that you believe that it is bad to kill people
you can change your virtures, for example, a young child initially believes that killing is ok and is a killer, later in life, the child is taken in to a home and taught that killing is wrong and over time they grow and change their virtures and now belive killing is wrong

Speech is the way to go and something u think about given