Going to be doing these as daily practice for a minute

I recently started a sketchbook for life drawing with ink. Lot to learn but it's been a blast.

I'm primarily interested in Disney's 'solid drawing' for animation and more constructive figure and illustration work but I would also like to master the technical skills in books like Loomis' Successful Drawing and Robertson's How to Draw. Artists depicted are Milt Kahl, James Baxter, Loomis and Akihiko Yoshida.