I too have just started learning prolog.
It is...um....
different.
You don't type a sequence of instructions telling the program what to do, instead you give it a list of facts and rules. Prolog is apparently very useful for natural language processing, it has built in features to implement grammars for formal languages.
I have been recommended this page, I haven't really gone through it yet, but it looks pretty helpful.
Learn Prolog Now.