Intro Component with Signup Form Master

Hello community,

Thank you for passing by my challenge solution. This had a lot of new things for me, italic text, multiple form inputs and Javascript. Although I'm very new to JS, I would like to know how common is to copy other's code and technique instead of creating own code? I performed all of the JS part in this challenge by getting the code from youtube and forums. I need to keep understanding JS to create my own code from scratch. Nonetheless I would like to know what to do you think about my solution and how could I improve any section HTML, CSS, and JS.

Once again thank you for joining my coding rode.

Hope you are having a great day!