Wellcome to FreeCodeCamp.
If you already know some basics HTML/CSS/JS, then it’s normal you find this easy … at the begining.
The challenges become more complex when you advance. And more important, the most difficult part are the projects.
Well, if after all this you find this easy then try this excellent challenge on JS Javascript30 by Wes Bos, and take a look at others awesome posts on the forum like :
https://forum.freecodecamp.com/t/computer-guide-computer-science-and-web-development-comprehensive-path/64470
https://forum.freecodecamp.com/t/computer-guide-get-job-ready-with-1-fcc-cert-3-projects-2-courses-and-10-books/64027
That’s it. I hope you found this useful.