How do I add USDT to BNB?

Excuse me, could you please clarify for me how I can add USDT to my BNB account? I'm a bit new to the cryptocurrency world and I'm still trying to figure out the ropes. Could you provide me with a step-by-step guide on how to accomplish this task? Would it involve using a specific exchange or wallet? Also, are there any fees associated with this process? It would be great if you could provide some insights on the security measures I should take to ensure the safety of my funds. Thank you in advance for your help!