How do I buy or sell USDT?

How exactly do I purchase or dispose of USDT? Could you elaborate on the process? I'm a bit unfamiliar with the intricacies of cryptocurrency trading and would appreciate a step-by-step guide. Is it necessary to create an account with a specific exchange? What kind of verification is required? And how do I ensure the safety of my transactions? Additionally, are there any fees involved in buying or selling USDT, and if so, how are they calculated? I'd also like to know about the best practices for timing my trades, given the volatile nature of the crypto market. Finally, could you recommend any reliable platforms or resources that offer comprehensive information on USDT trading? Thank you for your assistance.