General Thread for practicing question formatting!

[nabilroslizar]

//Get funds from users
//Withdraw funds
//Set a minimum funding value in USD

//SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import "./PriceConverter.sol";

//constant, immutable
error NotOwner();

contract FundMe{
    using PriceConverter for uint256;

    uint256 public constant MINIMUM_USD = 50 * 1e18;

    address[] public funders;
    mapping(address => uint256) public addressToAmountFunded;

    address public immutable i_owner;

    constructor(){
        i_owner = msg.sender;
    }

    function fund() public payable{
        // Want to be able to set a minimum fund amount in USD
        // 1. How do we send ETH to this contract?
        
        
        require(msg.value.getConversionRate() >= MINIMUM_USD, "Didn't send enough!");
         funders.push(msg.sender);
         addressToAmountFunded[msg.sender] = msg.value;
    }

    function withdraw() public{
        
        //for (/*starting index, ending index, step amount */)
        // 0, 10, 2
        for (uint256 funderIndex=0; funderIndex < funders.length; funderIndex = funderIndex + 1){
             address funder = funders[funderIndex];
             addressToAmountFunded[funder] = 0;
        }
        //reset the array
        funders = new address[](0);

        //actually withdraw the funds

        //transfer
        //msg.sender = address | payable(msg.sender) = payable address
        //payable msg.sender.transfer(address(this).balance);
  
        //send
        //bool payable(msg.sender).send(address(this).balance);
        //require(sendSuccess, "Send failed");

        //call
        (bool callSuccess, ) = payable(msg.sender).call{value: address(this).balance}("");
        require(callSuccess, "Call Failed");
        revert();
    }

    modifier onlyOwner{
       if(msg.sender != i_owner){revert NotOwner();}
       // require(msg.sender == owner, "Sender is not owner!");
        _;
    }

    receive () external payable{
        fund();
    }

    fallback() external payable{
        fund();
    }

} 

Hi, i'm having issues here, can someone help?