How do you start drawing from observation?
You can start by picking your drawing subject: it can be a “real life” subject, such as live model, still life, or a landscape. It can also be an image on your screen, as your reference. You need to have a sheet of drawing paper, average size, and your choice of a drawing media, such as pencil, willow charcoal, or a pen. You may need an eraser, if you are drawing using pencil, or a small piece of cloth, f you are using charcoal. You also need to have a “sighting stick”, a long, (about 12”) thin stick (such as a barbeque skewer, a knitting needle, or a long, wooden stick. That is going to be used for your measuring proportions (I teach that in detail). The place where you work needs to be well-lit, whether it is a room, or, if you are outside, a sunny weather.