It may be too late, but I just want to give some advice on drawing anyway. Hope you may find these useful~~
It is dependent on what you really draw to decide whether to ink the eyes first or last. Generally, it is better to ink the eyes last as you may need to change the position of eyes after drawing other parts. However, some may want to ink the eyes first before inking the hair as some hairstyles may cover the eyes.
Well, it is not a good habit to draw using tools, even drawing circles with compass or drawing straight lines with rulers. Unless you need to draw something is a perfect circle such as something as background, it is normally not a matter to draw a "bad" one. You may draw again even you get a "bad" circle. Just practice makes perfect~