[xwiki-users] XWiki API usage

Hi, I'm new to XWiki and trying to dig into the API usage. My goal is to write a little access client (for educational purpose) like create new users adding/edit pages and so on. The API documentation is al bit confusing to me. I didn't know where to start an get my initial "XWiki" object to interact/access the wiki and it's api funktions. there ist an xwiki object "com.xpn.xwiki.api.XWiki" but the constructor seems to get also an xwiki object wich i don't even have XWiki (com.xpn.xwiki.XWiki xwiki, com.xpn.xwiki.XWikiContext context) where do i get these object or where is the actual or right startig point? sry if this is asket before. but i didn't find the answer on the xwiki doku pages (there're more dealing with the velocety stuff) neither an the mailing list (as you can imagine im getting a huge amount of unrelated post when i try to search xwiki :( ) hope some one can give me a little hint on this best regards