Where can I buy IoTeX?

I'm curious about investing in IoTeX, but I'm having a bit of difficulty finding a reliable platform to purchase it. Could you guide me in the right direction? I've heard about several exchanges and trading platforms, but I'm not sure which one is the most secure and offers the best rates for IoTeX. Also, are there any specific steps I should follow to ensure a smooth and secure transaction? Your expertise in this field would be greatly appreciated.