Start off from the Guides section here. Its quite helpful for beginners.
Click the button in the menu.
Since you already have Installer, your phone's already been jailbroken, so you don't need to worry about jailbreaking. You can look up on how to use SSH and other stuff in the guides.
I would suggest the first thing you install before anything else is BSD Subsystem. You'll find it in the System category of Installer.
NOTE: You need EDGE activated or a Wi-Fi connection to install anything from Installer.
If you have any troubles, PM me. I'm from India as well.
Last edited by aahandagr8; 02-04-2008 at 02:21 AM.