If I already am a natural 32DD and want implants for more larger breasts/upper fullness, what will that look like?

You have multiple options. Breast augmentation with implants, fat graft to breast or combination of fat graft and implant placement. Unfortunately, it would be very hard to recommend a procedure without pictures. I do not like HP implants for the purpose of upper breast fullness. It is a great option for deflated breasts with the goal of high projections. I have a good number of patients who had a large breasts and we placed 500-550cc moderate plus profile implants which they were very happy. Good Luck.

At
size 32, each 100 cc of implant corresponds to 1 cup size change.  600 cc implants would take you up 6
sizes.  Implants are foreign bodies, are
not integrated and the body will surround it with a capsule.  As a result, the breast implant will descend differently
than your normal tissue, resulting in misalignment and will require
revisions.  Unfortunately, you have not
provided any photographs but there is an alternate way to achieve upper pole fullness
using a breast lift.  The technique I
recommend is The Bellesoma Method.  This
will reshape your breast tissue creating upper pole fullness without implants,
elevate them higher on the chest wall and more medial to increase your cleavage.  Vertical scars are avoided, nipple sensation
and the ability to breast feed are maintained. 
At the same time or later, fat transfers can be performed if additional
volume is desired.Best Wishes,Gary Horndeski, M.D.