How to buy BTC with USDT?

I'm interested in learning how to purchase Bitcoin (BTC) using Tether (USDT). Could you please explain the step-by-step process for a newcomer to the cryptocurrency market? Specifically, I'd like to understand the various options available for converting USDT to BTC, such as using a centralized exchange, a decentralized exchange, or peer-to-peer trading. Additionally, I'd appreciate any insights on factors to consider when choosing a platform for this transaction, like security, fees, and ease of use. Could you provide a high-level overview of the process and any recommendations for beginners?