Hi

I am working as Business Analyst. I am working on a social media Website project. Its almost like facebook where user can create their own profile ,can comment , like the other user's comments, ask experts question, can respond, Upload pics.

Now i need to create a Requirement Doc for the same from scratch  i need to present to the Client and the Stakeholders so I need Help.

I need some sample document which i can refer to

Also i want to make it more craetive i.e instaed of plain text Use cases, i want to make more and more  diagrams and flows. Please suggest some free tools.

Thanks in advance!!