Personal portfolio

Hello everyone, I am working on a personal profile and I am having trouble trying to add some javascript to my project. I want to add a feature that when a user rolls over the a word on the navigation bar, the information will appear on the same page. I have been using this gentleman site to try and do some research and I have been looking at the code on his page:

Jack Tomaszewski - full-stack freelance software engineer

Portfolio

Here you can find the list and brief descriptions of the projects I have recently completed.

This is all I have toward my site, the link is:

GitHub

GitHub - calvinalee2006/Portfolio: Codecademy Portfolio

Codecademy Portfolio. Contribute to calvinalee2006/Portfolio development by creating an account on GitHub.

I would appreciate any help (websites, youtube videos, explanations) and if you have anything negative please do not comment. ( I have been having an issue with that).

Thank you!!