I had trouble the first couple of times too even smacked my leg with the botom limb of the bow on release once. thats a feeling I wont soon forget lol. its possible that your draw is too long but more than likely you just need to give it a while. try shooting from your knees too its all good practice. check your form when you are sitting are you sitting striaght at the target or slightly off center like you would be when standing. as for shooting low its probably form also. you may leaning forward slightly. at least thats what I was doing