I could draw fairly well but not great before I discovered it, but someone gave me the original edition of this book years ago and it changed my entire perspective (literally). In a nutshell, it's all about seeing things as lines rather than as assigned shapes. Ask random people with no skill to draw an eye and you're going to get a similar shape from all of them. And while you will recognize that it's a human eye, it won't look anything like the one in OP's sketch. They're using the shape they learned as children. Another great example is "Christmas Tree". Those who do not think of themselves as having the ability to draw will certainly draw a large, triangular shape on top of a rectangle trunk. Maybe the triangle will be jagged to represent the branches and maybe not. We will all recognize it as a christmas tree, but it won't actually look like a realistic representation of one. This is symbol drawing.

The way to avoid this is too look not at objects, but at the lines they create between themselves and other objects of backgrounds. To see what is actually there instead of drawing a symbol for it. Symbols can be useful for communication (a simple smiley face conveys happiness quickly and efficiently), but they're not factual representations.

One of my favorite tricks in the book was the "upside-down sketch". Take a drawing you like and turn it upside down. Now draw it exactly as you see it, upside-down. This will force your brain to look at the lines instead of "that's an eye and that's a tree".

I don't know if any of that helps, but if you'd like to learn more, I strongly recommend that book.