1) great
2) no just the other way round actually ?
“So if I understand correctly I should load a Master BIAS when I create the Master DARK’s”
No, preferably not ? if you are going to use darks, it’s best to not use a master bias. So don’t load the master bias when you create the master dark. And don’t load the master bias when you calibrate the lights then.
And if you are going to make a master flat, always use a master bias or a master darkflat/flatdark ? to calibrate your flats.