Here is a link to the first of a series of videos that were created to walk people through the use of Vpython (which is pretty much the exact same thing as Glowscript). We did not make these videos and have not watched them and so cannot endorse their validity for this class but it is an additional coding resource that could be helpful.
https://www.youtube.com/watch?v=vEMCiugDnKI&list=PLdCdV2GBGyXOnMaPS1BgO7IOU_00ApuMo