How to convert stx to USD?

Could you please explain, in a step-by-step manner, how exactly one would convert STX tokens to US dollars? I'm a bit new to the cryptocurrency world and would appreciate a clear, concise guide on the conversion process. Could you also mention any potential fees or considerations I should be aware of when making such a conversion? Additionally, would you recommend any specific platforms or exchanges for this conversion, and why? Thank you in advance for your assistance.