If you are reading this, then you have successfully created a user name and password.
The next step is to joing the Entomological Networks that interest you. To do so, simply click on NETWORKS at the top of the page, then click on a Network you are interested in, and then click on "JOIN THE NETWORK" at the top-right of the page.
The image below shows where the JOIN BUTTON is on the page.
After that, go back to the NETWORKS page and select another Network, and join it. Repeat as many times as you'd like.