my render time was short beacause i want to know,what are you thinking about this guitar
The model looks okay so far, but if your plan is to use this as the main attraction for a render the devil is in the details so some up close pictures would be better to asses it.
And why render it standing upright when your image dimensions are landscape? Either turn the guitar on it’s side or render in portrait so we can get a better look at the guitar and not some boring brown background.
I agree with turquoiserabbit, the problem here is the camera. The model itself looks pretty much perfect to me from what I can see here. You just need to do it justice with a different angle and attention to the things tr mentioned above me. But good work!