I am the only guy handling all the things in to Web, Multimedia & graphic. (Graphic Design, Web design, Web Programming, SEO,Client Relation, Support, Maintenance, Invoicing, Server management, Domain Registrations, etc etc..)

I did able to install the Minibill witout any problems!!

but what is next?

How do i add all my clients, etc.. i could login to the admin area and edit some details there..

but still have some confusion!! where to start?

Can somebody help?

You should be able to just go to where you installed then add /admin/

Example:
http://www.ultrize.com/minibill/demo/admin/