Evaluation of the First Stages of Animation

After my first two days animating i have realised that my current story boards don't last as long as i anticipated. After completing the animation of my first board and been 3 seconds out i may need to place more imagery in my next ones so i fill my time more accurately. i can easily slide scenes into different sections if needs be. I find it difficult to plan the scenes to the music as you don't really get a sense of togetherness with my drawings and the beat of the music despite having key framed the main beats as you never know how it will translate to screen.