Looking Good! there's a great line quality and fluidity in Eliza's sketch. practicing fundamentals can help..Keep it up!!

Gotta love Eliza! Such a cool style. One thing that I would recommend is to pay close attention to the relationships between forms. For example, the two eyes. On Eliza’s there’s an upward angle connecting the two and yours goes straight out to the side. Another important relationship that many use would be the ears and the eyes. The angle between the two can actually tell you if you’re looking up or down at the head. Another thing to keep in mind is that forms wrap around the head. Keep it up!!

It is looking great! For critique I would say try to lighten your lines and vary their thicknesses. Fluidity is also something I notice in your reference's sketch while your sketch looks more stiff, exercises that focus on fluidity and line quality could help with that. Drawing with your shoulder can help open up your lines and create a more fluid look, if you are drawing very small using your forearm rather than your shoulder can also work and avoid using your wrist except for small details. Other than those things I would say just your fundamentals could be improved(but couldn't everyone's?😆) In which case I would say working on some of the courses on Proko could really help. Such as the figure drawing course. Keep up the great work Tobias!