How do I claim my OKX rewards?

Could you please explain the steps I need to follow in order to claim my OKX rewards? I've heard that there's a process involved, but I'm not sure what it entails. Could you walk me through it step-by-step, making sure to highlight any key points or potential challenges I may encounter along the way? Additionally, is there a time limit for claiming these rewards, or can I do it at my own convenience?