This is the pixel art section, you're not exactly supposed to post sketches here, but I'll give you some advice on how to get better at trees and pixelling them: Draw from reference or from life. Not just trees, other still life will help you as well, apples, bananas, shoes, trash cans, etc. You need to definitely learn the basics of art, it will take time for you to improve but I promise it will pay off, you need to go grab yourself an actual sketchbook from your hobby store and some art pencils, I use 6B lead myself, and start drawing things around you. Remember, all pixelling is is just another medium of art, there are no shortcuts to getting better at any kind of art, you just have to practice, practice, practice.