I have done this twice..Both times I walked all the way from ACOI to NYN via Cheoki Railway Colony..From NYN,boarded Rewa-ANVT Exp (loco ride) on first ocassion and JHS-ALD Pass on second ocassion..I am well aware of that road route since my uncle is a WCR crew member stationed at WCR crew running room Cheoki.
But this isn't for someone having heavy luggage..I didn't see any Ola/Uber there at ACOI/NYN..Yes E rickshaw and Auto is there..They can drop you at Civil Lines.