Hi »SH« Modders
Dont Know Where To Start???
I would recommend you start with Fallout III™. My Personal favorite to Mod, This game has the Tools,Community,Tutorials to help you on your way to game modding.
To Make It Ezz 4U Heres The Links (Right Click Open In A New Window On The Links)

Fallout III™ - The Game
Fallout III™ - The DLC's (Anchorage,Pitt & Brokensteel)
Fallout III™ - G.E.C.K Garden Of Eden Creation Kit & 1.5 Update
Fallout III™ - ModTools
Fallout III™ - Tutorials
Fallout III™ - The Nexus (Mods Site)
Fallout III™ - Game Updates
Fallout III™ - UK Version 1.5 Update
Fallout III™ - US Version 1.5 Update

Install the game
Install the DLC's & 1.5 Update
Install the G.E.C.K & G.E.C.K 1.5 Update
Launch the game with F.O.S.E Fallout Script Extender

Visit The Nexus 4all The Mods

I Recommend These Mods
BulletTime
Female Body Replacer (1+
The Latest Top 50
The rest is ^2U