1&2-The extra weight is probably to blame here.
3- You should get your cardio up to 40+ mins because you dont really start burning fat till about 20+mins. Also 7 mins would be more of a warm up to get blood flowing before wo.
4-It will help with belly fat and get stamina up
5-Drop your current bfast its nothing but sugar and fat. Eggs, egg whites, turkey bacon, oatmeal, MAYBE a little fruit (1/4 cup of berries in your oats) NO JUICE!!