Responsive contact form with HTML, CSS, and JS

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

I am proud of having done this form so accurately, of course it is not one of the best, but I can see the difference in my ability between today and two years ago. I feel that I need to learn new technologies to benefit from the time spent developing projects and the quality of my code for other developers.

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

The only challenges were sending the form, as I am a perfectionist, I thought about sending it for real, however, I had to improvise using fetch to display the success message.

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

I would like to know which technologies could help me even more in this type of project. What are the current trends?