Inferno (Italian: [iɱˈfɛrno]; Italian for "Hell") is the first part of Italian writer Dante Alighieri's 14th-century epic poem Divine Comedy. It is followed by Purgatorio and Paradiso. The Inferno describes Dante's journey through Hell, guided by the ancient Roman poet Virgil. In the poem, Hell is depicted as nine concentric circles of torment located within the Earth; it is the "realm ... of those who have rejected spiritual values by yielding to bestial appetites or violence, or by perverting their human intellect to fraud or malice against their fellowmen".As an allegory, the Divine Comedy represents the journey of the soul toward God, with the Inferno describing the recognition and rejection of sin.
Hell is divided to 9 circles. Each sinner is punished in a different way till eternity depending on the sin they committed. Depending on the sin its decided what circle they are sent to.
Dante has to be shown the consequences of his actions. So he is being shown hell first so that he can really see how bad things are if you don't follow the right path.