How do I buy US stablecoin?

I'm curious about how one can purchase a US stablecoin. Could you please provide a step-by-step guide on how to do so? Are there any specific exchanges or platforms that you recommend for buying US stablecoins? Are there any fees or minimum purchase amounts I should be aware of? Additionally, what are the benefits of owning a US stablecoin compared to other types of cryptocurrencies or traditional assets? I'd appreciate your insights and advice on this matter.