It’s already made I am just have terrible difficulty with physics
Hi!
First of all incredible CC, I’m absolutely in love!
I think the first problem is the pose. For the blender plugin/modkit the inzoi avatar has a default pose that is not the usual T or A poses. It is important you make the garment in that pose. If you don’t, the weight will be copied onto your mesh wrongly.
Did you make your mesh with Blender, CLO, MD or another software?
This is the correct pose:
Blender my skeleton doesnt look like yours
Hi,
Ok, Can you upload a short video of how you are applying the mesh? Are you using inzoi blender plugin?
Here’s all the information about the plug in currently available.
I did I guess it’s not meant to be 
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Hello! Do not be discouraged, maybe we can help you get it right!
Did you “Copy Skin Weights” with the modkit plug in?