I'm studying random geometric graphs (RGG's) in the context of ad-hoc wireless networks. I am not sure that I can help you but I will tell you what I know. Erdos-Renyi (or Bernoulli) random graphs are one example of a random graph but there are many others. Indeed, since the probability that a distinct pair of vertices share an edge is the same for all such pairs in the Erdos-Renyi graph, there is no spatial embedding of the vertices. This makes such graphs not so useful for the kind of things that I am interested in, where the probability that two vertices share an edge depends upon a random spatial embedding of the nodes (vertices), usually according to a spatial point process.
Anyway, if you are only interested in the Erdos-Renyi graph, do read their original paper - it is very accessible - called "On random graphs I".
If, alternatively, you think you may be interested in an overview of results primarily on the Gilbert graph and the $k$-nearest neighbour graph, then I can recommend "Random geometric graphs" in Surveys in Combinatorics 2011, authored by Mark Walters, as it provides both a very readable summary of some of the foundational results and simple proof techniques. It is important to note that both of these graph models involve a spatial embedding of the nodes in the plane, which you may not be interested in.