Welcome to the Translator group. Please read Tasks_and_Tools, Translate_a_Page and Translation_Workflow before starting work. You will find lots of help linked from those pages, but please ask if there is anything you don't understand.
Please be aware of the category translations that have been agreed for your language. You should find it here. A few new categories have been added since the list was translated, so if you could give me the missing phrases I will add them, or you could register as a translator on UserBase as well so that you have access.