Well, it's about time you learned how to use it. It may prove useful in the future.
Try this for size: http://tovid.wikia.com/wiki/SVN_crash_course
The basics steps are:
1. You check out the source tree in a new directory on your hdd
2. You add/change code
3. If you added new files that were not part of the original code you will need to do "svn add dir-name"
4. When you are ready to commit your changes, do a svn diff to see what would get changed
5. To commit something do svn commit -m "my comment goes here"
6. Profit.
You can commit part of the code if you run the svn commit in a subdirectory of the tree you checked out.