How to convert ice to USDT on OKX wallet?

Could you please explain the process for converting ice to USDT on the OKX wallet? I'm not familiar with the steps and I'm interested in understanding how to do it efficiently. What are the prerequisites I need to fulfill before initiating the conversion? Are there any fees associated with the transaction, and if so, how are they calculated? Is there a specific timeframe I should be aware of for the conversion to complete? Additionally, is there a minimum or maximum amount I can convert at one time? I appreciate your help in clarifying these details.