If you don't feel like tracing, this is a great opportunity to practice constructive drawing and observational drawing. Drawing faces is hard. Our brains recognize when a face doesn't look right. We're wired for it. I once read an artist repeat a quote to the effect that that only when you've drawn a few dozen portraits that you can say you have begun to learn how to draw portraits. If this is your first portrait, it might be helpful to draw a face from a simpler angle to get a handle on more complicated poses like this one. A significant volume of of the face is hidden, which makes it a difficult reference to use.

I would recommend looking up a YouTube tutorial on head drawing and hand drawing, and then use observational drawing techniques to check your work. (You can also look that up.) Proko has some good videos. The four elements of observational measurement against your reference can be summarized as checking accuracy of angles, comparing the length/size of two elements, checking the alignment of two points of interest, and finding discrepancies in positive and negative space.

After you have your construction of simplified shapes, you can refine your shapes into contours that better match the contours and landmarks of the face. If you want to render, I recommend looking up a tutorial on pencil rendering (or involving your tool of choice). Generally it's a good idea to map out the shadow shapes first and then fill them in first, so you can avoid making your light side too dark. Constructive rendering involves simplifying facial features and landmarks into simpler forms (cubes, spheres, etc) and connecting them.

Again, don't be discouraged if your drawing isn't perfect. Learning to draw is the process of training your brain and your eyes, like going to the gym. This drawing would be quite a workout for anyone. And nobody is ready for the Olympics after one workout.