well since cloth only reacts to the skeletal mesh it’s binded to, not sure how to go about making it react to other objects. I think there was an option to make it react to environment but I wasn’t able to get it working.
as for right hand offset and relative location, you can get the skeletal mesh and use the “get socket location” node to get the location of right hand. Just make sure you type in the name of the bone correctly. Then you can adjust accordingly