Hi the_alchemist! I started on LFS with the same laptop-type setup and I know EXACTLY how you feel!
Anwyay, based on your stats (if you haven't seen them, click on the little stopwatch under your post count), I would say the AA Demo servers are a good place to run some laps and get some good practice
However, practice will get you a few more seconds off your time, but if you happen to be running the default setup, it will be near impossible to get
really fast times. So, don't get discouraged if you plateau at one point and can't improve.
If you feel you want to try new setups, go on
www.setupgrid.net and download a few there. In the grid find either
FBM/XFG/XRG @
BL1 (game codes for the cars, and Blackwood respectively).
Simply download and the file should automatically go to your setup folder, and will be available to you in the game when you go to "Pits"/car setup screen (setups are listed on the top-right corner).
Hope it helps, and happy racing! Always great to have new faces!