BLog listing!

I'm trying to set up a local xwiki site for our institute. Download an installation finished. Local XWiki works fine! I'm new to the scripting languages Groovy and Velocity. I'd like some help in generating a list of all BLog entries in lets say a category with name X! Can anybody help? It'd be fairly ease, but don't know how to tackle this problem at the moment. Thanks in advance! Regards, Gerard