Yeah I’m struggling, too. I’ve been breaking the Loomis head into steps: 1) draw a circle 2) draw a sphere in perspective 3) just the cranium I’ve been using sketchfab to generate the references. For the “circle in perspective” i used a basketball, which has a set of perpendicular lines on it to practice from. For the cranium, there are Loomis head references for just the cranium to practice from. I’m getting better, little by little, and I’m starting to see things in more 3d than I did a few days ago, which makes me hopeful.