Hi, welcome to the city! Don't worry about classes at the basic level its pretty easy (at least i thought so) if you study right. As far as dealing and handling the gross stuff, theres stuff where you won't even notice till afterwards and then there are one's where you my puke and then go right back and do what you were doing before you puked. Just the other day I did a call with a medic who has been in the field for 20+ years and we got an OD who was puking up lung tissue and he got puked on pretty close to the face and he yacked on me then he went right back to trying to tube him. But those kind of calls are far between, here anyway. To me those calls are fun maybe its because i amb still new (in the field for 2.5 yrs) but i still love the gross, nasty, icky things. Well again welcome to the city and EMS.