im going to be 100% serious when I say that they arent the greatest pieces, i am i impressed because i can tell you put plenty of work into all of them. luckily enough, you are still young and you have plenty of time to practice. whenever you have a bit of down time pick up a pencil and just draw something you see around you. the best way to perfect your own style, is to make hundreds of little sketches and doodles every time you have nothing else to do. time for something i suppose is a lil bit more constructive towards helping you, try using your pencil at angles and not just straight down like you are writing. when you tilt your pencil while you draw it adds depth to your lines making them stand out, its perfect for doing hair or an outline sometimes. i do apologize if i sound like a jerk, but i do want to try and help with any knowledge i gained through the years. i dont use the physical mediums like pencil and paper much now a days because i have the time to use my computer more often but back when i was still in school i did draw quite a bit. and as you said, you arent perfect, but neither am I. in fact no one is, and if someone is perfect, its only in their minds. good luck and practice.
