How do I change the properties of a vanilla block?

[LuigiPlayer1]

I am new at modding and i am in forge My question was how do i modify an already existing block property, like for blocks that you create its easy:

public static final RegistryObject<Block> BURNEDWOOD = registerBlock("burnedwood", () -> new Block(BlockBehaviour.Properties.of().blablablabla));

but what do I put in for just vanilla blocks(I want to change the oak log to take more time to cut down, but idk how to access the properties of said block)

[blinky000]

You can't change vanilla. The best you can do is create a custom block, and inherit your block from the vanilla one