Comunicate with printer

Question

Put beforehand, I've never work or study anything like that, at my workplace they gave me this Printer and I need to find out a way to let it comunicate (and print) with my pc throught STM32cubeide and this nucleo

This is my main.c:

int main(void)
{
    uint8_t txData[30] = {0};
    uint8_t rxData[50] = {0};

  HAL_StatusTypeDef ret;

  HAL_Init();

  uint32_t tout_led = 0;

  MX_GPIO_Init();
  MX_USART2_UART_Init();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */

    strcpy((char*)txData, "Hello World!");

    char ch = 'A';

    ret = HAL_UART_Transmit(&huart2, txData, 5, 30);
    ret = HAL_UART_Receive(&huart2, rxData, 3, 50);

    while (1)
    {
    }
}

Most of the code has beeen wrote by my collegues, but I know that I should wrote, to let it print on the printer, inside the parenthesis of strcpy((char*)txData, "Hello World!");

But I dont know how, I never studied anything like that and the only person here who figuried out how to do it change occupation.

It is the manual they gave me, but I dont know what to do with it -> Manual Or more precisely, I dont know how to apply what it's written in c language.

If someone could help me, even just how to move around, it will be very much appreciated