There is a readme in the SVN.
The SVN version is not really designed for casual players, it is a half-built version that is for experienced users to experiment with and test.
I don't mean this to sound disparaging, but it is unlikely that you would have gained enough experience with the ArmA engine family if you only started using it yesterday.
My advice to you is to spend some time getting used to the game, to the editor and to complete addons.
Once you have worked out how to install addons and how to use the ingame editor, we can start thinking about getting you set up with the SVN version.
I doubt this was the answer you were looking for.
TL;DR: Read the readme, I'd advise you to know the game better first
