Feedback and Questions

I finally finished my first portfolio ever. I did lots of googling, and looking back but it was fun. Here is my link:
Feedback is welcomed. Also, should I move on to the next lessons and retouch up my portfolio later? I have not added functionality yet that I would like to add later such as hovering over images and other animations.

Thanks and yes, that’s one thing I noticed… I thought i did something wrong with my navbar. How do I add bootstrap javascript? and for the height/width. should I make them a number of pixels or use percentage?

Got the javascript part. Still unclear about the images.