This was my daughter. Entered college without one credit from AP or DE. Needed 131 credits to graduate with civil engineering degree. Her scholarships (merit and athletic) were for 8 consecutive semesters. Guess what she had to do?
She took 16-17 credits every semester (I think one 19, but it included tennis and beginning Spanish). She took Calc I and more than 50% of the class had already had calc in high school but not her. She studied hard and got an A. If she’d known more about getting credit for hs classes, she would have tried to get the English and history requirements out of the way through DE and done the science and math the way she did, starting at the lowest level in college but with a really firm foundation in math, chem, and physics.
131 credits, 8 consecutive semesters, no credits going in, no summers. It can be done.