Did the fork already happend?
Do I need to download a new wallet or something?
We are still working. But I can report that the bulk of the work for the fork has been completed. We are going to be entering a rigorous testing phase this week I expect (depending on how the holidays throw off our timing and everyone's ability to help). After the testing phase I expect there will be some polish of the code and then expect a full press release from rofo announcing the precise parameter changes and the date of the fork. At that time I will also have some press releases with tutorials about how staking works and how to use coin control to maximize your staking reward.
At this point I would recommend checking this forum thread every 1 or 2 days to make sure you don't miss any announcements.