Just started taking lessons and had some quick questions... 1.) I am in dreadful shape. What are some exercises I can do outside of lessons that will help prepare me for some of the drills? My cardio is by far my biggest weakness, but I also feel like I don't have the muscle to be effective either. Should I just run and start lifting weights? 2.) Might sound like a silly question, but I feel super awkward wearing boxers while rolling, especially since I don't have a Gi yet and practice wearing shorts. What kind of underwear is recommended for optimal comfort? Or should I just wear biker shorts or something underneath? 3.) What are some good ways to practice drills outside of lessons if you don't have someone who's willing to be be your dummy? Thanks!