Where can I sell Harmony One?

I'm a crypto enthusiast who's recently become interested in Harmony One, but I'm unsure of the best platforms to sell it. Could you recommend some reliable exchanges or marketplaces where I can cash out my Harmony One holdings? It's important to me that these platforms have a good reputation for security and transparency. Additionally, I'd appreciate it if you could mention any specific steps or considerations I should take when selling Harmony One to ensure a smooth transaction.