app doubts

Starting weight is your weight when you started.  Current weight is what it is now.  At the beginning they are the same.  After a while, current weight will be less than starting weight.  

In order to lose weight, you need to eat fewer calories than you burn daily.  That's different for everyone.  There are a number of calorie calculators online, I'd suggest doing several and looking at middle ground.  Or you can take a simple short cut and choose a number.  1,200 is the lowest recommended caloric goal for women, so that's what I use.

Once you have your daily caloric goal, CM can calculate your macros, or I can help you with it.