>>10051657first draw lines. straight lines, curved lines, squiggly lines. draw dots and connect lines between the dots.
once you can control your hand enough to draw a simple line the way you want, then draw shapes. boxes, spheres, cylinders, cones, pyramids, eggs
once you can draw all these shapes in whatever orientation you want, in correct perspective, then connect them. draw them stacked together, intersecting, at different positions relative to each other, in different sizes and distances
then learn how to shade them. learn how the planes of the shapes define the way light behaves on them and the differences between how shadows work of hard vs soft edges
once you can do all that, congrats, you can draw anything