I took EMT - B while i was in highschool and i know that now with my college load i would definatly suggest A+P either 1 or 2 , because you do get brief overviews of that in the course . umm really any kinda health science class might be helpful but good luck with all of your classes
As far as clinicals went they didnt cost me anything , it was 10 hours , either in the ER or i had the option to ride with medics ( which i would recomend cus that helps a lot) you just have to get a TB test .