One quick way to do this is to simply prepare 10 paragraphs, each containing a single word. The idea isn't to write great text here. It's simply to get some legitimate vertical space in your document so you can see and test the effect of your internal link. Now look at it in your browser. You should have a link near the top of the document and when you click on it, it should jump you to a spot near the bottom of the document.
Internal links can go either direction.
So to make sure you understand how to make one, make up one of your own that takes you from the bottom of the document, back to the top. Ok, time to get fancy. Think about it. If you're not sure, try it. Hey, I know it doesn't work.