Where can I buy Aptos Coins?

I'm quite interested in Aptos Coins and am eager to purchase some. Could you possibly direct me to a reliable platform where I can buy them? I've been searching online but the options seem overwhelming and I'm not sure which one is the most trustworthy. Is there a specific exchange or brokerage you recommend for buying Aptos Coins? Also, do you have any advice on how to ensure a safe and secure transaction when purchasing these coins? I'd appreciate any guidance you can provide.