Implement Authorize.net API into existing .Net web app

Currently running a .Net core and MVC web applicaiton . This project sends helps smalkl business owners send Web invoices to client by email. The application needs to do the following.
1- From the User dashboard page code the form to enter the configuration of Authorize.net signatuure or secret keys.
2- enter API code where e-invoice carries the link to redirect to a payment page
3- Complete the process to store the processor responce back to client
4- store event in windows SQL database.