Welcome to the forums!
Not many here know Spanish(?), so it's a bit difficult to understand your question Google translate tells us:
is a bit tricky to install the java and then set up, and let me know if I can send some kind of link, which shows the configuration documentation and complete installation
So you want the documentation for getting started with JBoss AS7? It's available here https://docs.jboss.org/author/display/AS7/Documentation