"The Death of Venus" Digital Painting. Based on Botticelli's "The Birth of Venus"

Here's my first pair of rough ideas for Anti-hero for the challenge, I want to end in a ink composition, so I'm working the design of the character first, but I haven't draw in a while and I'm doing these out of my head, and I'm never sure what drawing aspect to work on while doing this, also I feel like a have this bad habit of rushing things trough. Also whenever I try to draw from imagination I end up defaulting to the same boring pose and angles. Any advice on what to work on here other than using reference? Because I am going to do that too.