Quantity leads to quality. Doing twenty 1-minute sketches is more valuable for a beginner than one 20-minute drawing.
Understanding the "Value Scale" (from white to black) is what creates the illusion of 3D depth on a 2D surface. IV. Overcoming the "Ugly Phase" Drawing for the Absolute and Utter Beginner
Instead of drawing a chair, draw the "holes" or shapes between the rungs. This prevents the brain from reverting to symbolic drawing. Quantity leads to quality
A medium-tooth sketchbook (around 70lb–90lb) prevents the lead from smearing too easily. Drawing for the Absolute and Utter Beginner
Drawing for the Absolute and Utter Beginner: A Roadmap to Visual Literacy Introduction
You do not need professional-grade equipment to start. A "solid" start requires: