A beginner's personal portfolio: design and code feedback desired

Hello. I made this page knowing nothing but basic HTML and CSS + bootstrap (and Googling). I’ve gotten it to a point where it’s mostly clean and functional, but I don’t know where to take it from here because I don’t know good coding practice or design principles, and I’d appreciate any feedback regarding the design and code. I’d also like to know if it would be good for me to move on to Javascript at this point.

Thank you!