I think they are great for a start. My honest critiques would be:
In photo 1:
1. I like the choice of background - what did you use?
2. The right eye could possibly use with a bit more light - I think you had the main light a little too high.
3. There are a couple of hot spots on Simon's face, especially forehead and nose. Did you
modify your light source at all?
In photo 2:
1. Not sure if available for you, but a second light source (even a white reflector of sorts) on your right side (Simon's left) would have filled in the shadow on that side, particularly near his nose - very hard shadows.
2. I like the idea of the camera prop, however, it is almost obscured by shadow - I actually didn't notice it the first time I looked at the pic. Again, some fill light could have helped there.
3. As in the first, there are a couple of hot-spots on Simon's forehead.
The choice of pose and clothing really suit the images you have captured. Well done.
Cheers