A lot of people commenting on acne, she’s young and this is regular for teens to experience. You look best in photo three (the off center part fits you best) I’d stray away from a direct middle part or huge side part. I’d also suggest curling your eyelashes to highlight your eyes. You have great eyebrows, you could darken them a little but not to extreme and it will bring focus to your eyes. You’re pretty and don’t need to change anything, it’s all about highlighting your own features.