Social links profile - HTML | CSS

What are you most proud of, and what would you do differently next time?

I was able to revise some CSS stuff, and I believe I did a good job on this. This time I was also able to use a 1440px display.

What challenges did you encounter, and how did you overcome them?

The challenge itself was pretty straight forward in my opinion. The only doubt I was having was to use a button or an anchor tag. Decided to use an anchor tag because ultimately, it's for hyperlinks.

What specific areas of your project would you like help with?

Check my semantics and syntax please, specially whether I should continue using classes for h1's, h2's,... I want to become a consistent Frontend developer.