If you want to improve your drawing and sketching skills, after learning basic techniques, PRACTICE is the only way you'll get better at it. This practice if done using variety of exercises, gives results faster.
Drawing is an essential skill in various aspects of life and I am not talking only about art.
For example, drawing is done to create art, to create plans, to design websites, to describe concepts, to learn a subject, to express feelings, to communicate effectively, to eliminate day to day stress, to just have fun and the list goes on.
Drawing guide from zero: fundamentals, human proportions, still life and perspective
https://www.skillshare.com/classes/Drawing-guide-from-zero-fundamentals-human-proportions-still-life-and-perspective/661672503
In this class, you'll learn the basics of drawing, including: the fundamentals, human figure proportions, still life and two types of perspective.
You know how I love the Appearance Panel and the power it gives me. I could not resist the urge to bring you another class to teach you a new pattern repeat I like to call the Flip Flop! In this class, I will show you that Illustrator has plenty of tools, panels, and commands to make our work much easier. You will learn a bunch of new skills and reinforce many you have learned, and they include brushes, repeat pattern design, the use of the Appearance Panel, Effects, and, of course, transformation.
Learn Impressionism techniques creating this Aspen Autumn Landscape painting. For total beginner through advanced painters.
Impressionist painting with a focus on light. Bring a luminous quality to your paintings you’ve never thought possible. Learn how to build a painting in one sitting, “alla prima”, and how to savor interesting brushwork. You will also learn the invaluable concepts of drawing, value, color, and edges. Use these methods and knowledge to start your painting off right if you're a total beginner, or to take your painting style to the next level if you're more experienced. You’ve never painted like this before.