Simple Wordpress Works - PHP Post Get (Payment Gateway) and Profile

Hello, I am currently building a portal website, in terms of design I nearly finished the website. You will not have to worry about the design or UI/UX as long as the content you will build is editable via wordpress. What I am looking for is support in the following: (Detailed Description Below) 1- Building My Profile Section 2- Building Online Payment Section 3- Refining 2 Pages I built for displaying Online Training Material , one will be to show a full screen PDF and the other page will be used to show a full screen video that will be uploaded to wordpress media (Pretty Easy) 1- For the My Profile Section: Currently I tried to use a free plugin however I don't mind if you change it. I am looking to enable the following: I want the user to be able to edit his personal information, Name, Description, School, LinkedIn Link, EmaiL Address, Birthday, Etc... I want it easy on me to create additional fields for the users to fill and disable other fields. In addition I want to add the option for users to write some articles Also, I want users to be able to join chat rooms. I want to be able to create chat rooms and choose which users are allowed to enter those chat rooms 2- Building Online Payment Section Currently we are redirecting the payment to a PHP file using GET/POST Protocols. However, I want to integrate this post/get functionality within wordpress. In this section the user should be able to input any amount and proceed with payment. Our payment processor is [login to view URL] (This should be as well pretty easy for someone who have worked before in this) Looking forward to receive your offers. We can schedule a call to discuss further details.