Hi MWW - nice to see you again - hope things have settled down a bit for you? 
Ten - picture...picture...picture....
Em - don't worry about that bit - just ignore it! 
Bo - you've got the general idea - doing a whole body workout will benefit you so don't stress too much. Try to do something for every part as your body works as a whole unit - unfortunately strengthening one part at the expense of another may just lead to an imbalance. Get one of the instructors to do you a head-to-toe workout - just make sure you swap from one area to another between exercises e.g do triceps extensions, then squats, then lat raises, then calf raises, then abs, etc etc - doesn't have to be a long sesh!