So you think you are bad at anatomy?
Well what if I told you that what it is you're bad at isn't anatomy and it's portion?
What is portion? You ask well portion can help you draw anatomy if you understand portion and if you know those then well you don't really need to learn realism lol
Portion is how big an object is compared another one..
Example:
The middle finger is typically, usually, the roughly same length as the palm and the total length of the hand is typically, usually, roughly the same length as the face not head but face
The pinky fingers are the same length as the thumb and the total length of your hand is roughly the same length as your foot and your foot is roughly the same length as your bicep? Upper arm :D
So ultimately just learn portion it will help you a lot!
What can portion also help with?
Perspective!
What? You may be thinking so let me explain!
Perspective is how far or close the subject is to the viewer in the art work in the form of a painting, illustration, or photograph
Learning portion can also help you with perspective in some ways specifically to keep things in roughly the same size and in the same plane
Learning perspective can also help you with your art game regarding of what it is you're drawing
As well as you guessed it say it with me: Portion!
Which in the case you aren't drawing just a human but a landscape too
Let's say a tree and some mountains
So this case you would use a combination of portion, scaling, and perspective
In this case scaling is how big an object is compared to real life and portion is how much space an object should take up compared to another and perspective is how far away the object is
You would eye subject bigger compared to the others
For instance
If it's a human you would make the mountains and trees appear farther which would make them smaller
But if it's a tree or mountain you would make those bigger and the human as something interacting with them so the don't look like they don't belong in the small image
Would learning anatomy help you draw?
Yes but as well as perspective portion and a little bit of scaling
Instead of learning how to draw realism learn anatomy, portion and perspective!
That will help you most in your drawing career!!
And if you don't feel like doing all of that use a reference pertaining to real life or a real person for art study instead of fan art
That should help with a lot of your drawing problems
As the people say work smart not hard
And if you need to be like me and stare at your reference for such a long time you look stupid because you forgot how to draw then do it I'm not stopping you
Also...
Start by drawing everything with a simple shape and adding more lines and shapes (and erasing!!) till you get the form or the shape of the object you are happy with then add extra details
Trust me you will thank me later :)