Excited or not, you gotta maintain the drive. 7 years ago DMU gave out the biochemistry notes the day before the first class. I was super excited. I told myself I'm going to totally devote myself to being awesome at podiatry - a commitment I had never made to myself in undergrad. I sat down and studied for 7 hours straight. Went to school the next day. Painful realization - my 7 hours of study had covered 1 day of lectures. I was not ahead. I knew 1 day worth of material very well. School is a marathon. People have breakdowns during 1st year - those who ask for help earlier are more likely to make it through.
Material in school (1) repeats itself (2) is tested repeatedly. Learn things right the first time and save yourself suffering later. Clotting cascades are going to be tested on in biochemistry, physiology, pharmacology, pathology, etc. Learn it right the first time and its just a refresher the next time. Take a class with cumulative testing and there may be "old" material questions on every test after the first.
Everyone worries about failing. The simple and unfortunate truth is that in general the schools accept everyone. The idea that you've been accepted therefore you must be great does not apply to podiatry school applicants.
Last of all, screw mandatory lectures. Terrible waste of time.