I think you are:
A modern digital camera
People think a part of me is sticky, but i'm not.
Sticky can mean complex or difficult instead of adhesive. People thing that getting into photography and taking great photos is really hard, but it isn't. It is easy to get into photography, and with modern camera's (such as in the iPhone) it is easy to take great pictures. If you are inexperienced, then great pictures come from many pictures and studying your results to learn from what you did.
I do have a sticky friend though.
old-school film camera: has film to develop, requires manual adjustment of focus, shutter, and such. Takes a lot time to tell if you did something wrong. A film camera only took a few dozen photos then ran out of film, while the digital cameras of today can take and store thousands of photos.
I can create almost anything,
It can take a picture of nearly anything
but i'm not very creative.
the camera only does what it has already been built and programmed to do. It doesn't invent new functionality on its own.
After I have done my thing, you can't tell that I did it.
The modern camera does high dynamic range, panorama, color adjustment, and the pictures look realistic like what we see with our eyes so the complexity of the transformation is not visible to the viewer. In the best pictures the camera and the photographer are invisible, just a great capture of the subject that leads to an emotional response to the image.
To be honest, it wasn't my creation to begin with.
the camera captures what is, but doesn't create it. It doesn't act on its own, but is controlled by the photographer.