Comment by floxy
Another good resource for learning how to draw realistically is the book: "Drawing on the Right Side of the Brain". The premise is that your brain wants to take shortcuts and group/chunk things together on what they should look like, instead of what things actually look like. But even a rectangle in real life has non-right-angles because of perspective, etc.. And if you draw what you actually see, then the drawings come out correct. Some of the exercises are copying other drawings placed upside-down, so that you brain doesn't try to over-interpret things. I can't recommend this enough if you want to go from a beginner to something respectable in drawing abilities.
https://www.amazon.com/Drawing-Right-Side-Brain-Definitive/d...
https://kk.org/cooltools/drawing-on-the-right-side-of-the-br...
I read the book and loved it (about 15 years ago). There’s no royal road to becoming an artist but lots of joy along the way. Whatever the path, enjoy it!