Admin backend functionality for html site

Hello, i need help in creating a functional admin dashboard so my users can log in and perform varioius tasks such as investing , because that is basically the project i am working on at the moment. I have the admin dashboard layout, however I am stuck as to make it functional

What stack are you using?

Do you have registration and authentication working with a DB yet? Or you just have the dashboard layout made up?

I just have the dashboard layout. I don’t have registration/authentication working with a DB yet

How proficient are you in writing Javascript and writing it for the back-end?

I have an idea about it, on a scale of 1 -10, i rate myself 5.