Bug when making mobile pages from desktop


I’m building a portfolio website and I have finished the desktop layout, so the next step was to build the mobile layout. I created the mobile layout from the desktop but it seems that all my text and links are broken, and that my website is super buggy in mobile. Some images are missing, my font is missing and links aren’t carried over from desktop to mobile.

Wondering if anyone might be able to help with this, as I’m looking for a new job and don’t want to send my portfolio out only with desktop usability.