Looking great, man! The modeling is spot on!
—Mumbling about lighting—
The lighting could use a bit of work though
Blender Internal is fantastic if you know how to set up good, complex lighting. It can get results that are on par (and more customizable) than the unbiased rendering engines in my opinion.
However, it looks like you only used one light. You need at LEAST a few lights (main light, bounce lights, indirect lights, etc.) and it would be nice to turn on ambient occlusion. Having a great lighting setup will increase your render time, but it’s worth it :D. Really just observe the real world. What kinds of effects happen when light bounces around? No shadows are pure black :). Also, most shadows are at least a BIT soft.
—END Mumbling about lighting—
—Mumbling about materials—
It would be nice, also, for the table to be at least slightly reflective with fuzzy reflections! I’m sitting at a desk like this right now, actually haha. Almost everything is at least a BIT reflective at an angle, but not always noticeably. Smooth wooden tables are definitely noticeable with the reflections though :D! So I would either turn on reflections or add a bump map.
—END Mumbling about materials—
Hope this was helpful!
Anyway, looking great! Be proud!
Can’t wait to see work from you in the future! Great job