do a google search.
to lengthen the penis, the surgeon cuts the suspensory ligament where it is attached to the pubic bone. your penis is not really longer, just more of it is outside your body. the problem is that it will no longer point up. whether hard or soft, it will just hang down.
to thicken it, something gets inserted, such as hyaluronic acid gel or alloderm (extracted from donated skin)
none of these are really good options. just be content with what you have