Answer:
use you pencil horizontaly and try to shade and then use you finger oy bud to look more better. :)
Now for some tips
1. Use a Full Range of value.
2. Use line Quality.
3. Stay consistent with Your style.
4. Know Your Medium.
Some of the qualities of Mannerism that are reflected in Bronzino’s work were “elegance, style, and technical skill. also the Mannerists took a very different approach. the term “mannerism” was used to suggest a more formal, less passionate approach to painting, with a focus on technique and style”.