Hi there Ginga
For a first go its pretty good. On the part with matching references its important to note that it might match refs in the front and side views etc but these do not show an accurate representation, its well worth looking in the persp view as well as gaterhing lots of ref for the character that your after so you can get the perspectives correct for where the contours change, such as the cheaks and the forehead, in the fornt and side they look fine but in perspective it might be off.
"No pressure, no diamonds" Thomas Carlyle