Since we are a base ETH project, you will need to bridge Ethereum from ETH mainnet to base chain, so you have base ETH!*

I have attached relay.link which is the safest/fastest/cheapest source I've used to bridge funds! You will connect your wallet to swap from whichever token you choose, into base ETH, this is critical!
*Opensea accepts ETH/L2s or USDC if you prefer that payment.