You should look in the tutorials folder, and open the file there in VS 2008 (well, thats what i use anyways).
Once opened, you can remove the "00 - Start.cpp"
You can then add things like
\Advanced\2 - Animation, Physics, Rendering\Rendering\04 - Suns.cpp
And compile, and see the sun things, and mess around with it.
I can tell you this though, if you dont read up on stuff, and just play around with it (does not matter if you break something, just reinstall it), if you dont do that, you will have about 7-8000 questions more to come
I dont mind answering questions, i dont think anyone does, but its just ALOT quicker if you check out all source sample, and PLAY around with them, as said, if you break something, just reinstall, but then you learned that