Too many lines? Do you use all your strenght on your pencil?
It's good to know how to sketch with soft lines and when to stop drawing.
Many times I keep going and going because it's was not what I wanted or expected. I kept searching for the perfect form, volume, pose... no matter what just draw as much as possible and avoid to
have an eraser at all.
There is no wrong, or right, just the will to practice and be better.
Your final art will be your point of view to share with the world.
People can always give their opinion to improve someone's work.
Constructive criticism is welcome, but sometimes people don't feel like sharing their art or their opinion. Sometimes you shouldn't listen to people at all.
Little things can make the difference.
So get started.