"You know nothing about her."
Translation:Nic o niej nie wiecie.
Yes, yours seems more of a neutral word order, Paranoix's seems to underline "don't know" more, and "Nic o niej nie wiecie" sounds like something a guy would say to his parents who disapprove of his new girlfriend.
Although frankly, thinking too much about 'what would which version stress' can make one easily arrive at overinterpretations, so don't stick to that too much ;)
Thank you. Trying to get to grips with this and will probably take quite a few sentences to become familiar with the usage. Maybe because it's difficult to find English examples to learn the use of cases but I will work at finding links to associate with! Esp struggling with locative which I think in English is all about location( in, at, on, etc) but in other languages is also about the way in which something is done?
Locative is the only case which works exclusively with prepositions. I even came across a textbook once, where it was labelled "the prepositional case". So I would interpret it as an grammatical accessory to [o, na, po, w(e) and przy]. But note that depending on meaning and context the former four can also be used with the accusative case.