How do I mak my players arm punch?
You will need to find a punching animation compatible with your asset. I would look here https://assetstore.unity.com/3d/animations
or here for arms with animations https://sketchfab.com/search?features=downloadable+animated&q=arms&sort_by=-relevance&type=models
You want to go here to add animations to your asset
then you want to apply them here
It is just a cylinder I just want It to be able to destroy a tree.
I just want me able to punch a tree down
See this for details on the topic of making objects disappear with code. Object visiblity