Cutout object blend seamless?

quick question, just need a simple solution, ive cut myself out of a photo and placed it onto a new background, there is a very slight border around myself, which upclose zoom in , you can notice (the final image is, desaturated), i just want easily blend the background and cut out layer of me so that the “border” isnt noticeable, the cut out of myself edge is smooth, and would look fine, if the “border” wasnt noticable.
or would it be easier to go around again?
cheers.
