trial buys are always a great idea until you work out the kinks. he needs to transfer the ETH from an exchange (like coinbase pro) over to the metamask wallet.
but if he connects the wallet to pancakeswap, that won't work, because ETH is only for uniswap.
just tell him to go here to buy the ETH version of BEACH:
and he will need the "contract number" of BEACH to create (import) a custom token for BEACH into the asset tab of the metamask wallet. that number is here, on the middle left portion of the page:
Register for free to join our community of investors and share your ideas. You will also get access to streaming quotes, interactive charts, trades, portfolio, live options flow and more tools.