Getting into Pitt/Transferring into Pitt

Hello all,
I’m a current high school junior, class of 2018, looking at colleges. My dream school is UPitt, but my freshman and sophomore years of high school weren’t so hot. Combined GPA of 2.8, but as of recently my grades have been doing much better, I’m taking honors classes and will end with something near a 3.5 or above. My SAT score is a 1350 on the new scale, and I’m taking it again in August. I wish to go to school for computer science. Obviously with this GPA getting into Pitt is going to be very hard, so what I was thinking of doing was either attending a regional campus at Pitt and transferring in after a year, or a year and a half, or to attend a different university entirely, like St. Josephs’ for example, and trying to transfer in after my first year. Which of these is a better idea?