Welcome aboard Neven

. There is a great deal of quality information already published on this site that might supply you with answers to your questions. It might be a good idea to paw through the boards and become familiar with the material.
To best offer advice to address your goals, it would be worthwhile if you would offer some information about yourself:
² physical (gender, height, weight &
fat level)
² current nutritional profile (breakfast, lunch, dinner & snacks)
² current activity level (workout, aerobics, walks & sports)
² fitness goals (target fat-loss, target muscle-gain)