How to buy $arb?

Could you please elaborate on the steps involved in purchasing $ARB? I'm relatively new to the cryptocurrency market and would appreciate a detailed explanation. Specifically, I'm wondering about the platforms or exchanges that support trading $ARB, the necessary requirements or accounts I may need to set up, and any potential fees or costs associated with the purchase. Additionally, I'm curious about the security measures I should take to ensure a safe and secure transaction. Thank you for your assistance in guiding me through this process.