How to buy USDT?

I'm quite new to the world of cryptocurrencies and finance, so I'm a bit puzzled about how to buy USDT. Could you possibly explain the steps to me? I've heard it's a stablecoin pegged to the US dollar, which sounds quite appealing in this volatile market. Do I need to set up a special wallet for it? And which exchanges would you recommend for buying USDT? Also, are there any fees or commissions I should be aware of? I'd really appreciate your guidance on this matter.