In response to post #111301203. Join the discord server "Scrub Milks Barn": https://discord.gg/mT4r8yFTpj There you will find all needed software and templates, also if you will be kind - you will find support. Or if you are solo player - watch these videos:
The modding is not so difficult as may seem at the beginning. Yabber and FLVER Editor are enought for basic modding: retextures, hiding meshes, materials swap. Actually this guide is sufficient to start modding with custom meshes, but you will need the Blender and BloodborneTools: