Can I buy arbitrum on Coinbase?

Excuse me, I'm a bit confused about the cryptocurrency market. I've been hearing a lot about Arbitrum and I'm interested in investing in it. However, I'm not sure if I can purchase Arbitrum tokens directly on Coinbase, which is my preferred platform for buying and selling digital assets. Could you please clarify if Coinbase supports Arbitrum trading and if there are any other reliable exchanges or platforms where I can acquire Arbitrum tokens? Thank you for your time and assistance.