Thought of the perfect way to explain them.
Think tea and/or coffee.
Capitalism is Creamer, which has many choices and not all international. Everyone can get or have something different.
Socialism is half & half, which is fairly even and might come in different flavors. Balance of having choices and not having choices.
Communism is just milk, perhap’s even powdered milk. There are no differences, everyone gets the same. You don’t really need sugar do you? Good, because you don’t get any