Best way to set up CRM

Best way to set up CRM

I have been using Zoho for several years now, but I am embarrassed to say that I am still not quite sure I am using it the right way. 

Here is my challenge/question. I have a company, that I would like to become a client. They are on my targeted list. I know several individuals at the company. If I create a Lead for each one, and use the same Company Name, will I be able to search by Company and see everyone that I know at the company?

At what point do they become a contact? I am very confused on the flow of contact information.