I've seen enough of these threads that I compiled a rough path to Kim Jung Gi style drawing:
- Get good at drawing from reference (get accurate, learn comparative measurement, copy artists you like, try tons of different styles, do short drawings and long drawings, do slow and fast)
- Get good at perspective (If you need to then just stick to boxes but the sooner you use it practically for environments, mannequins/boxmen, vehicles, interiors etc the quicker you will learn it and solve practical problems)
- Get good at construction(breaking down anything into primitive 3d shapes, most figure courses teach this specifically for the figure but something like dynamic sketching teaches it for everything. You can make any 3D form with a box so thats why the box meme exists)
- Use construction and perspective together to be able to draw simplified versions of anything in perspective and rotate it (think of animation background courses, they get reference and then place it in 3d space in their background.)
- Draw not just from reference but also draw that reference from memory to build up your visual library of textures, details, design language etc (for figure this would be anatomy/clothing/hairstyles/variety of faces/character design stuff)
- Practice drawing simplified 3d form versions of objects from imagination and then detailing them with your visual library.
- Eventually try to transition to not having to draw the explicit 3d forms as a guide, instead seeing them in your head and going straight into your visual library / details (i.e. what kim jung gi does)
-None of this is linear steps, its just a constant circle of getting a bit better at each step. You will still be "getting good" at drawing from reference or perspective or figure drawing or construction 30 years from now even if you draw everyday. But you will be "good enough" way before then.