Extremely basic bow struggles

I'm playing bow. I'm still at very low levels (grade 2/3). I feel like there's no way I could possibly do enough damage to kill monsters, at my best I'm doing half theirr health when time runs out. Am I doingg something wrong? I'm trying to dodge away and then charge up to level 4 shots. It takes so much time to dodge away and then the monster closes in. How am I supposed to play bow?