How to change USDC to USDT?

I'm a bit confused about cryptocurrency conversions. Could you please explain to me how I can change my USDC to USDT? I've been hearing a lot about USDT recently and I'm interested in diversifying my crypto portfolio. However, I'm not entirely sure how to proceed with the conversion. Could you guide me through the steps? I'd also like to know if there are any fees or risks involved in this process. It would be great if you could provide some insights on this matter. Thank you in advance for your help!