Good Going Man.. Nice touch with that rays of morning fog and over all nice illumination.
Hmm but there's somethings you need to fix in my opinion.
1> The posters on the wall lacks specularity.
2> Reflection and specular on the guitar and amp needs rechecking.
3> Use ambient occlusion to fix contact shadow issues.
There are/might be more but as you're starting out the above are the basic fixes.
Creativity is to create the best with the little knowledge One have.