answer:Yeah, it’s confusing stuff. Dark matter is present practically everywhere, we know it is there because something with force is acting upon things, we can prove this, and the only logical explanation is that it is dark matter. The whole thing is confusing because technically it is theoretical, because we can not prove it absolutely, but something has to be there. If there was not, the things that have been affected would have acted entirely differently. As far as dark energy compared to regular energy, its basically just what we can measure, and what we can’t.