To name an element, I see texture, in the hair and eye sockets, I would also recommend just google searching elements of art, and their definitions, and matching any up to what you can see
The best answer here would be pencil.
Artists use pencil to make sketches and create studies. They then use these sketches and studies to create their final larger piece. They use pencil because it's quick, can be corrected, lightweight and easy to use. Before pencils artists would make charcoal drawings but once we had pencils it made sense to use them as they aren't messy like charcoal.
Knowing that you will be absolutely fine :) self awareness and care is very important. Having a conflict if your life can disturb your mental and physical stability.
