Where can I buy arbitrum arb?

Excuse me, I'm new to the world of cryptocurrencies and have been hearing quite a bit about Arbitrum ARB lately. Could you possibly direct me to a trusted platform or exchange where I can purchase Arbitrum ARB? I've been doing some research but with so many options out there, I'm a bit overwhelmed and would appreciate any guidance you could offer. Are there any specific steps I should take to ensure the safety of my transaction? Additionally, are there any fees or commissions I should be aware of before making my purchase? Thank you for your time and assistance.