As a smoker myself, I'd first concentrate on getting your flowers and paths done and then concentrate on the embroidery. You may find that a) your habit is broken by the time you have completed your top; b) with the fabrics you've chosen that it may not need the addition of embroidery.
You always have the option of adding embroidery once you have your flowers/paths completed and/or the top. Your hands/brain will tell you where you need to go.