Questions about cloth tool

Hey there,
I’m currently working on a character. She has a loose cape and a skirt that I want apply cloth data on. I’m using the new cloth paint tool inside the editor. I painted it but the skin is overlaping the cloth. Has this something to do with the physical asset? I’m not sure if this was generated correctly (see images). Also, do I have to weightpaint the loose cloth inside my 3D program (Blender) beforehand?

Thanks for the answers!

Yes, the cloth will test collision against the physical asset, so try making the collision on the legs smaller