The ONLY way you can switch options is if HR asks you if you want to switch. Not because they are just being nice and want to give you what you want, but because they have a need for it. They will not let you switch just because you want to switch.
It is 6 weeks. It is a lot like a private pilot ground course with some ATC stuff thrown in. It is a good refresher to get your mind back in the game and if nothing else, pocket a bunch of per diem for a few weeks.