How to automate a website login in such a way that we should know each step whether its is executing or not in java...?

I need to automate the 3 click step first login and next page is the pay button, in code i am not getting any error but i am not able to verify that, whether it is executing every step or not, where it is failing, which click is missed out.

Here is my code please review it.

String URL = JsonPath.read(resp, "$..data.amazonPayResponse.amazonPayLoad.paymentRedirectUrl").toString().replaceAll("[\\[\\]\"]", "").replaceAll("\\\\/", "/");
System.out.print("\n=============link==========\n"+URL);

WebDriver driver = new  HtmlUnitDriver();
driver.get(URL);
driver.findElement(By.id("ap_email")).sendKeys("1234xxx123");
driver.findElement(By.id("ap_password")).sendKeys("xxxpasswordxxx");
driver.findElement(By.id("signInSubmit")).click();
WebDriverWait wait = new WebDriverWait(driver, 60);
WebElement payNowBtn = wait.until(ExpectedConditions.elementToBeClickable((By.xpath("/html/body/div[1]/div[1]/div[3]/div/div/div[2]/div/div/div/div[2]/div[2]/form/div[2]/div[1]/div[1]/div/span/span/input"))));
payNowBtn.click();
driver.quit();

It is working when I use this path but still it only works in local machine not under Jenkins

By.xpath("//input[@name='ppw-widgetEvent:SetPaymentPlanSelectContinueEvent']")