I suggest looking at Simple ERC20 Crowdsale. It includes a migrations script and sample token.
In OpenZeppelin Contracts 2.5.1 the name and symbol were part of ERC20Detailed. In OpenZeppelin Contracts 3.x ERC20Detailed was merged into ERC20, which is why you are getting the error: Wrong argument count for modifier invocation: 2 arguments given but expected 0. constructor(string memory _name, string memory _symbol) ERC20(_name, _symbol) public {