https://www.skillshare.com/en/classes/Sketching-Learn-Basic-Nature-Drawing-Techniques/882636160

will demonstrate how to grasp fundamental sketching abilities step by step.
We'll look at materials, mark-making and textures, shadow and perspective, drawing approaches that compliment each other, practice a lot so you can see the results, and, most importantly, you'll learn how to draw anything.

Although I designed this lesson with a concentration on sketching the natural world in mind, the skills given will help you draw any subject, and it's an excellent starting point for anybody who wants to begin a sketching practice.

Because this is a beginner's lesson, you will just need the most basic drawing tools: a pencil, a colored pencil, an eraser, and drawing paper.
There are no prerequisites; the program is intended for beginners or artists who want to rediscover the fundamentals.