I think you should study anatomy from a biological perspective; it might help you. One more thing, usually most artists have developed shortcuts to simplify a lot of things, like Proko and Jeff Watts usually simplify a lot of things with respect to shape and straight lines, likewise George Bridgman mostly simplifies sketches with S lines and value with respect to contrast. Like Rembrandt usually uses soft edges and high contrast, or name any artist. As a beginner, you should focus on learning all the basic principles and fundamentals, then use them to your liking and make a style. If you are unhappy about something not looking the same as an artist, I believe at your level only difference is style. Style is just another name for design. How well you can design your principles with fundamentals usually makes a difference between a good style and a bad style. There is no good and bad in the arts; the art is diverse, but designs are for sure good and bad, because design is problem-solving, and putting anything intentionally where it doesn't belong might not solve your problem and make it an incomplete design or usually people say it is bad design.