Glaedorf

Hello good guys ! If I win I be able to create the best mod of skyrim ever. I'm new with this software and I can't find the selection one-by-one polygon I've try everything and I can't find usefull tutorial. I try also to retexure Merhunes Dagon from Oblivion to add him in Skyrim SE. Does anyone know how to retexture or select one by-one polygon ? Basic tools I know... If I Add Merhunes Dagon in Skyrim, how do i can make him move or use his 4 hands ? Do I use Skyrim creation kit for this ? If you are french you can speak me french because I know there is a lot of French here. If you have another advice I'm here.