Independent HR Consultant - What are the ways to source the candidates online free of cost?

I worked in a job consultancy for a while. Now, I want to work as an independent HR consultant. I need help with the following:

1. How to get started.
2. How to sign contracts with clients.
3. What are the ways to source candidates online free of cost.
4. I am a very hardworking, sincere, and honest person.
5. It would be very helpful if someone could assist me in working as an independent HR consultant.

Dude, if you have no clue, I believe that you need to work for some more time. Only experience can answer your questions efficiently and effectively.