Base Apparel Coming Soon

Hello, thank you for passing by my solution, any feedback, good or bad, is welcomed and encouraged :).

My questions to the community are:

1. Do you think that the input positioning inside a container setting the button in an absolute position was the right choice. How could I have done it better?

2. I believe my JS code is not very clean and very long. How can I change this since if the form has many inputs it would be a gigantic code just to show error messages, icons and variations. Was my technique correct or do you think I should have done in another way?

Thank you all for passing by and helping me improve in my coding journey.

Have a great day. :)