Excellent written Conversion Tutorial for Avatars

https://vrwiki.nexisonline.net/wiki/VRC_to_CVR

VRC to CVR resources:

Brainlet Youtube Tutorial
https://www.youtube.com/watch?v=sjlrNxoe68k
Physbone to Dynamic Bone Converter
https://github.com/Dreadrith/PhysBone-Converter
VRC SDK3 to CVR Converter
https://github.com/imagitama/vrc3cvr
VRC SDK2 to CVR Converter
https://github.com/Narazaka/VRC2CVR

CVR supports Cloth Simulation

Magica Cloth setup/tutorial
https://forums.abinteractive.net/d/21-magica-cloth-installation-guide-for-cvr
https://magicasoft.jp/en/magicaclothmeshclothstart-2/