Servicing diy

Maybe this is covered in a pinned post amd I missed it and if so I apologize, but for a moderately skilled shade tree, how difficult/ what specialty tools would be needed to flush and swap cvt trans fluid on a 2023. Most of my experience is with clapped out manual shit boxes and the outback is my partners car. They just told me the dealership cost to do a fluid drain and fill and it's outrageous so im looking for options and or a sobering "get wrecked you can't"