However, what I am looking for is some way in which the bar on top of the website can contain links that I can then use to redirect users to other posts exclusively under those sections.
See, this is where I think most people get confused. Many themes are made to show Pages on that top bar, and so people think that Pages are therefore the only way to do it.
Evita was correct. If you want to group posts together in bundles, then you want to use categories and that's all there is to it. Doing thing the right way makes things simpler.
BUT, you also want to show them on that top bar. The correct answer is to change the top bar to show Categories instead of Pages. See the difference in thinking there?
Doing this is generally simple. You're going to find the code in your theme that generates the top bar. It might be in the header.php file, or it could be elsewhere. Regardless, it's going to have a call to wp_list_pages. By modifying that or adding a call to wp_list_categories there, you can put categories in the top bar.
HOW you do that is something I can't tell you, because it depends a lot on your theme. But the basic principle is the same.