Simple 2D Floor Plans for a refurbishment

Hello you clever people!  Yesterday, I downloaded Draftsight to use it for creating some simple Plans for the Builder, the Plumber, the Electrician and the Interior Designer - you get the picture!  I wonder, some time ago I used Google Sketchup with some success, but found it hard work!  Can you point me in the direction of some relevant material, but not an over the top tutorial, to help me on my exponential curve?  I would really appreciate your guidance here!  Unsure if you need to know, but my lap-top runs Win7 32-bit, 4.0 Gb RAM.  Chris