Audiophile e-commerce website using REACT and SASS

Hello FrontenedMentor Community.

This is my first time using React and i was able to come up with this. However, I'm struggling with the Form Validation. I couldn't change the radio button color and sometimes, after filling the forms, it asks for another set of validation and i can't figure what the exact problem is. I would love a recommendation about background image usage too.

Thanks for your time