Custom PHP & JS Registration Form

Hi All,

I’m creating a custom website and I need custom login forms. I have tried multiple plugins and ways to do it and none of them give me exactly what I want. I have been able to create exactly what I want hard coding a form in PHP with Javascript hiding/ showing the forms based on user selections etc.

My question is how would I go about taking everything I’ve created outside of wordpress and adding it into wordpress? Some of the results I found on google seem old and don’t want to try something if it’s outdated and wont work. Not sure if I can use a Code Snippet Plugin to copy and paste my code in but if that’s the case, how would I go about this for the multiple pages I have?

Any advice would be great ??

Thanks

The page I need help with: [log in to see the link]