What a developer portfolio should show
Lead with two or three projects you can talk about in depth, not a long list of tutorials. For each one, say what it does, which stack you used and why, and the hardest problem you solved. Link the repository and a live demo when you have one.
List the skills you have actually used in those projects. A shorter list you can defend in an interview beats a long one you cannot.
Do you get the source code?
If you searched for a portfolio website with source code: this is not that. Your page is hosted here, and the design code is not handed over. If you want to own and edit every line, a site you build yourself and host on GitHub Pages is the better choice.
Use this if you would rather have a good page live today, with fast server-rendered HTML and a clean link, and no front end to maintain.