I'd say year 1 is 80% basic science 20% dental (including a day in sim each week). Year two is opposite that. 85% dental and sim and 15% pharm. And pharm is only 2 quarters. By dental, I mean dental lectures. So no basic science stuff D2 at all.
First year, you will adapt quickly. It's actually two tests per week at 7am. Tuesdays are basic science; Thursdays are dental (not a big deal, but you still need to study for them). But you quickly get in a groove and find out what works for you (sit in every lecture and take notes, don't go to lecture at all, attend some and rely just on ppts for others, etc.). It'll fly by. D2, it's just Wednesday at 7am. But instead of studying a dozen or so hours of basic science lectures, it's a dozen or so hours of dental lectures.