Forum OpenACS Q&A: Response to What can I do with OpenACS?
After fixing your security problems, I'd suggest reading carefully through the OpenACS Installation Guide and the OpenACS Getting Started Guide. Both should have been installed with your OpenACS 3.2.5 software, under /doc/openacs/, or in your case http://www.edwinx.com/doc/openacs/
Perhaps the most common and useful module to get started with would be bboard, the module which creates forums like this one. Try http://www.edwinx.com/admin/bboard/ and add a new topic to get started.