Can I buy 1 USDT?

Excuse me, I'm quite new to the world of cryptocurrency, and I'm wondering if I can purchase just one USDT? I've been hearing a lot about stablecoins and their potential in the market, and USDT seems to be a popular choice. However, I'm not sure if there's a minimum purchase amount or if it's possible to buy just a single unit. Could you please clarify this for me? I'm eager to get started in this exciting realm of finance but want to make sure I understand the basics first.