I would be interested in quantum entanglement, or as Einstein put it - “spooky action at a distance.”
It would imply instantaneous communications over any distance, if one could figure out how to send and receive the information.
No. It does NOT.
Quantum "entanglement" is a slight misnomer. Because the "particles" in an entangled system are indistinguishable, neither of them are really present at either location in the sense they would be in classical physics (or in our intuitive understanding of particles.) Entangled "particles" are nothing more than indistinguishable states in a quantum system. Altering one projection of this multi-component state effects the projection of another component, and the state as a whole. Because it is never anything but a single state, it cannot be used to transmit information. If it could, there would exist Lorentz frames in which the state vector of the component measurable by the "receiver" would transition before the component was altered in the "sender." That could be used to violate causality. [Loosely: time-travel]
https://en.wikipedia.org/wiki/No-communication_theorem
https://en.wikipedia.org/wiki/EPR_paradox
I should mention there are some--actually reputable--physicists who believe the No Communication Theorem is not true. This considered a fringe position.
“It would imply instantaneous communications over any distance...”
That is a common misconception, but anything of that nature is specifically ruled out by the no communication theorem in quantum physics. Transmission of information using quantum methods is limited to the speed of light, just as it is using normal methods.
My wife figgered that out long ago!