Custom User Data

Hey..!! I am in the intermediate stage of learning wordpress. I am creating a site for an organization.

Firsty, I want to create custom user login page. I have read about it so I hope I will be able to do it.

After a user login into his account, he should be able to see the website as well as a page (different from profile page) where different details related to him are present (like salary, attendance report etc). These details are entered by the admin staff of the organization. These details are different for different users.

Along with this, I also want to create a forum where these members can come together and discuss. I have no idea about how to do that.

Please help me as soon as possible.