Blockchain Expert for Ethereum Token

We are going to add a “Buy Button” to our website* that is transparent to the new users. The expectation is “inexperienced/first-time Cryptocurrency” buyers can buy our new token painlessly. We Will need a smart contract that requires the first transaction – enter total “dollars”, log into the “wallet” site, add a new account, provide a secret password and log in information. Link to the credit card or debit card (Swipe?) to pay for ETH. Purchase our token with the funds initially inserted less all transaction fees and slippage.
Would a Crypto website be necessary and make the above project possible?