My first static portfolio website

Hi, i just finished my first portfolio website. I know it’s not good like others but, i need your feedback for my improvement :). got a problem when im trying to put footer on the contact’s page, it cannot stay at the bottom. and also i felt hard while making the dropdown menu. I know i just had to google it, but all resources i found its hard for me to understand (especially listening) because english is not my first language. so i didn’t add that feature. Please if you can share how to make dropdown menu, add it in feedback.

code: GitHub - domsulu/website-portfolio: This is my first website portfolio
live version: My Portfolio