Hey, first of all, you absolutely don’t need to use javascript. Most have come back to redo there portfolio with their new knowledge.
When you start, I’d begin with deciding what you want to show (most likely: About / Portfolio (with thumbnails) / Contact (link to social media) sections). Then make those sections (simple divs) and go to the Bootstrap docs to figure out to make a working navigation bar.
You’re basic portfolio is done! Since you have done quite some css, it shouldn’t be too difficult to give it a (simple) nice look 
Do remember to come back after you’ve more experience to redo it. This is not required, but I think your portfolio is a good page to show what you’ve learned.
EDIT: Have a look here: