While in Albania completing academic and military training, Caesar was assassinated.
So at the age of 19, Octavian chose to immediately "throw himself into the backstabbing world of Roman politics" as the heir to Caesar.
Much of Augustus' knowledge of the Roman politics came from shadowing his great uncle Caesar through the board of Roman Priests and accompanying him on the many expeditions.
He went to great lengths to carry out the will of Caesar for the citizens of Roman, despite great opposition from Senator Mark Anthony.
In doing so, Octavian gained great support from Senators and citizens alike all over Rome.