Magento 2.3 How to automate custom cron job from custom module?

I am working on Cron from custom module to send email from custom cron job, I created it as below but the cron job is nor working on the server.

<?php namespace Name\Module\Cron;  use Magento\Framework\Mail\Template\TransportBuilder; use Name\Module\Model\MyModule; use Magento\Customer\Model\CustomerFactory; use Name\Module\Helper\Data;  class RfqCron {  protected $  _logger; protected $  customerFactory; protected $  transportBuilder; protected $  helper; protected $  _myFactory;  public function __construct(     \Magento\Framework\App\Action\Context $  context,     \Psr\Log\LoggerInterface $  logger,     \Magento\Framework\Translate\Inline\StateInterface $  inlineTranslation,     \Magento\Framework\App\Config\ScopeConfigInterface $  scopeConfig,     \Magento\Store\Model\StoreManagerInterface $  storeManager,     \Magento\Framework\Escaper $  escaper,     TransportBuilder $  transportBuilder,     CustomerFactory $  customerFactory,     Data $  helper,     \Name\Module\Model\ResourceModel\MyModule\CollectionFactory $  myFactory ) {     $  this->_logger = $  logger;     $  this->helper = $  helper;     $  this->_myFactory = $  myFactory;     $  this->customerFactory = $  customerFactory;     $  this->transportBuilder = $  transportBuilder;     $  this->inlineTranslation = $  inlineTranslation;     $  this->scopeConfig = $  scopeConfig;     $  this->storeManager = $  storeManager;     $  this->_escaper = $  escaper; } public function execute() {     try {         $  myCollection = $  this->_myFactory->create();         foreach ($  rmyCollection as $  myData) {             $  customer = $  this->customerFactory->create()->load($  myData->getCustomerId());             $  customerInfo = array(                 'name' => $  customer['firstname'],                 'email' => 'xxxxxx@gmail.com'             );              $  currentDate = date('Y-m-d');             $  myExpireDate = $  myData->getExpiryDate();             if ($  myExpireDate == $  currentDate) {                                     $  templateId = $  this->helper->getConfigValue('mysettings/my_customer_notification/customer_email_template_expire');                 $  emailTemplateVariables = array(                     'email' => $  customerInfo['email'],                     'name'   => $  customerInfo['name'],                     'msg'  => "email sent from cron"                 );                 $  storeScope = \Magento\Store\Model\ScopeInterface::SCOPE_STORE;                 $  this->helper->sendEmailToCustomer(                     $  templateId, //email template id                     $  emailTemplateVariables, //variables                     $  customerInfo //receiver                 );                  $  myData->setMyStatusId(4);                 $  myData->save();             }         }         $  this->_logger->addDebug( "Message sent" );         return;     } catch (\Exception $  e) {         $  this->inlineTranslation->resume();         $  this->_logger->addDebug( "Message not sent" );         return;     } }   <?xml version="1.0"?> <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Cron:etc/crontab.xsd">     <group id="name_module_cron_group">          <job name="mycron" instance="Name\Module\Cron\MyCron" method="execute">             <schedule> * www-data PHP /bin/magento cron:run</schedule>         </job>     </group> </config>