Skin graft healed very bumpy. I feel I can't go out. It is obvious and I don't want it to stay this way. (Photo)

Intralesional injections of Kenalog and possibly laser treatment would likely be beneficial. A dermatologic surgeon should be able to help you with this.  It should also get better with time.

Please know this is not yet healed. It is alive tissue, which is great, but it is not fully healed and has a long way to go. Before you do anything, you need to be patient and wait for a few months. "This
answer has been solicited without seeing this patient and cannot be
held as true medical advice, but only opinion. Seek in-person treatment
with a trained medical professional for appropriate care."