Ridiculous high gas fee in production

Smart Contracts
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1

Hi,
I was trying to create a new smart contract with Remix.
It should be something like a lottery.
I made a simple function to enter the lottery:

function enter() public payable {
        require(msg.value == ticketPrice, "Incorrect ETH amount sent");
        players.push(msg.sender);
    }

Remix was showing gas fee of around 50000.
Now after deploying the contract and using the function on etherscan, I get the message of MetaMask, that the gas fee cant be calculated and MM sets the gas fee to $300.
I know that with increasing the array size, the gas fee will get higher, but $300 for the first entry?
Any idea how to fix this?