Online Learning Platforms Resources

The problem I'm having is that my students are clicking a category tile and being directed to the category links instead of the courses in the category (which are under all of the category links). I have 30 categories and 300 courses, so there are a lot of category links. Students click the category tile and see the links and not the courses and end up going back and forth between the category tiles and the category links looking for the courses (the courses are under the category links but the students are not realizing this and a lot of my students just click off). The category links should be under the actual courses in the category. In other words, the students are clicking the category tile expecting to see the courses--not the links--and so the courses should be at the top of the page and the links at the bottom of the page. With the links at the bottom of the page, if the student clicks a category tile and sees the courses and then wants to click another category, the links are accessible at the bottom of the page so the student doesn't have to go back to the home page. How can I manually change this?

I'm a newbie to email marketing. I'm a bit overwhelmed with the tagging and want to be clear on the difference between students who register vs. just sign up for the newsletter etc.