To understand many of the concepts of the Infinite Us there are various levels of connected and interconnected consciousness that we need to explore. This is a list of those with links to further reading as necessary.
Your Local Consciousness Group’s family, schoolmates/coworkers, friends… neighbors. The more their Local Group has in common with your Local Group the tighter the connection.
When your conscious energy first cohered there were an inconceivably large number of physical “yous” throughout the multiverse. With each new decision of yours and of those around you more and more “yous” formed. The “yous that made similar decisions and lead similar lives for the Local Consciousness Group.
We exist in just one, of an infinite number of dimensions. Every choice we make guides how our specific version of our dimension plays out for us and others that share our specific dimension.
Basically all of existence, every multiple universe, is true and present until we settle on the one we are in by, well, observing it. Schrodinger’s cat is the most famous thought experiment of this concept.