I know where there is other life. but does my reasoning make sense?

Would that not depend on both the number and type of dimension they were inhabiting? Incidentally humans are four dimensional, or perceive four dimensionally, but this being said if the earth exists in other dimensions it is logical to ume that there are similar dimensional refractions of the people here. We would not find parallel Earths, simply the other 11 dimensional properties of our own. We may be only able to perceive four dimensions directly, but we certainly exist in more, and I see no reason to preclude a nine dimensional being having four of those dimensions visible to us. On the other hand if you move through the higher dimensions then location becomes irrelevant, especially as our notion of location is based on four dimensional preconceptionas. So an entry point from one dimension would theoretically be able to exit into any area of a superimposed dimension. Whilst we may not find another Earth a la Quantum Leap, we could certainly contact other forms living exclusively in those dimensions, though even recognising what constitutes sentience in a dimension we cant see would be immensely challenging, and then theres the problem of communication and determining what even qualifies as a location by their terms