Am I doing this right?

Morning/Noon/Night everyone! (Depends on where you live lol).

Yesterday I began a new diet/workout plan. I just want to make sure it's alright;

In the morning I drink coffee with creamer which is about 100 cals or less altogether and a bagel thin slice, like this: http://www.walmart.com/ip/Thomas-39-100-Whole-Wheat-Bagel-Thins-13-oz/15716613 (not this exact one but u get the idea) with apricot preserves which has 0g sugar and only 10 cals a tsp.

For lunch, I may have this http://www.walmart.com/ip/Sara-Lee-Thin-Style-Honey-Wheat-Buns-12-oz-8ct/17178071 with turkey or chicken breast and a bit of Miracle Whip, the light one. And I'll drink water or some kind of juice or cold tea.

A snack in between, 100 cals or less.

And finally for the night I'll eat a salad or whatever mom's making. Usually something healthy and she cooks without salt.

Anyway, in the gym I'll do cardio about 30-40 mins and then I'll proceed to doing legs/abs or arms/shoulders/abs, they alternate depending on what day it is, for example, today I have to do arms/shoulders/abs combo and tomorrow legs/abs combo. I rest Mondays. I do this 1 day 1 combo the other the next so I generally rest 2 days before I do the same exercises again.

Is this all ok? I heard that you should rest 3 days before you work on the same muscles. Is this true or am I doing fine?

Thanks for your help in advance.