How to get click a random link in a web element

I am currently training in Selenium. The objective of the task is to:

1. Navigate to a random Wikipedia page
2. Pick a random category from the page's list of categories
3. Select a random article from the list of pages in the selected category
4. Output the compared differences between the categories of the original random page and the second one.

I have gotten all the way to the category page, but for some reason the code wont click on a random article within that page.

Here is my current code for the category page

        //Navigating to the category list at the bottom of the page
        WebElement Category = driver.findElement(By.id("mw-normal-catlinks"));
        Category.click();
        //finds a random link in the category list
        Random r = new java.util.Random();
        List<WebElement> links = driver.findElements(By.tagName("mw-pages"));   
        //picks a random link
        WebElement randomElement = links.get(r.nextInt(links.size()));

        WebElement NewCategory = driver.findElement(By.id("mw-pages"));
        NewCategory.click();
        Random n = new java.util.Random();
        List<WebElement> ArticleLinks = driver.findElements(By.tagName("mw-pages"));
        WebElement randomElement2 = ArticleLinks.get(n.nextInt(ArticleLinks.size()));