How do I make choppable trees?

I want to make a game like Lumber Tycoon 2, but I do not want to copy it at all, so I will be using completely different trees/axes/features, etc. I also want to make this script myself with tips from other people. I know VERY basic scripting like variables and the onTouch feature, but I simply don't know how to do what I'm trying to do. I want people to be able to walk up to a tree, equip the axe, aim their cursor at the tree and click to cut, then an animation can be viewed as the character swings at the tree. As soon as someone has "claimed" that tree by starting to cut it, I need to make a number percentage on the tree to show how much it has been cut (At 100%, the leaves would disappear and the wood would fall to the ground). Finally, I wish that players can pick up this wood and sell it by placing it onto a conveyor (again, I will make it completely different from Defaultio's Wood Dropoff).

One more small detail, I will need certain axes to be able to do things faster. For example, a basic axe which mines trees slowly. A really good, (but difficult to get) axe would mine trees quickly. Also, specific axes would break specific wood, like a lava axe would break lava wood very quickly (again, I won't include lava wood in my game because Defaultio has done it already and I don't want to be blamed for copying his game).

Thanks :D