Before starting your sustanon cycle I would recommend you checking your training and nutrition schedule. Be sure to train hard at least 4 days per week, eat very very good and use protein shakes as protein amount should not be less than 2-/kg . Once these are on point you can start sustanon cycle .
Dont think that neglecting nutrition , rest and hard training principles are not important while you are on steroids , that is not true. Better think what else you can do to benefit by maximum growth while you are on steroid cycle. Steroids use must be wise.