How do I buy arbitrum on Uniswap?

Could you please elaborate on the steps involved in purchasing Arbitrum tokens on Uniswap? As a cryptocurrency enthusiast, I'm interested in understanding the process from start to finish. Specifically, I'd like to know about the necessary prerequisites, such as having a compatible wallet and sufficient funds in Ethereum. Additionally, I'm curious about the search and selection process on Uniswap, as well as any potential risks or considerations I should be aware of before making the purchase. Your guidance would be greatly appreciated in helping me navigate this process smoothly.