Go to https://cryptotesters.com/community/mint and connect your wallet to the website.
The mint is on Optimism a Layer-2 network on Ethereum where transaction fees are cheaper. To mint, you need to change your Metamask network to Optimism. Click on the “Switch to Optimism” button.
You will need 0.3 $ETH for the NFT and a tiny bit more to pay for Optimism transaction fees. If you $ETH on Ethereum mainnet you can go to Hop Exchange to bridge $ETH from Ethereum to Optimism (tutorial). If you have no $ETH on Ethereum mainnet you can buy some with credit card through a fiat on-ramp service like Ramp Network or an exchange like Binance or Huobi.
Once the $ETH has arrived in your wallet, mint the NFT and join our Discord.