How do I buy Optimism on Uniswap?

Could you please elaborate on the process of purchasing Optimism tokens on Uniswap? I'm interested in understanding the steps involved, from connecting my wallet to executing the trade. Could you also mention any potential fees or considerations I should be aware of? Additionally, is there a minimum amount required for the purchase, and what are the payment options available? Thank you for your assistance in navigating this process.