This is my first attempt at styling a bonsai. I went for a formal upright. I would appreciate any feedback.
Ask yourself "does this look like a tree in nature?" The answer is "no". What is wrong? Too many low branches, not enough depth to the design.
In the wild, conifers grow tall and they start to lose their lower branches as they are shaded out. Additionally, back branches for bonsai are critical to the design - they make the design 3D and give it feeling. Your current tree design looks 2D and flat.
Here is an idea of what eliminating the lower branches and adding some back branches would do for your tree:
It "feels" more like a tree in nature... because I followed nature's rules for a formal upright. Try to make your bonsai look like trees in nature. If you struggle to have an image in your mind, go online and print out a photo of a real tree... and then print out the photo and have it next to you for inspiration as you style your bonsai.
By the way - I hope I do not dishearten you. I am sharing constructive criticism based on what I see. From where you started, with that material, it was good step forward. Now you just need to keep thinking like a tree