I'm currently working on my EMT-B while full time studying for my BSN. It's actually not that hard since a majority of what gets covered in an EMT course is learned in A&P courses and any basic first aid course. All it takes is some really good time management and some motivation. I would personally say go for your EMT-B at the same time cause it will help in the long run especially for when you do your health assessment courses and clinical rotations. Good luck!