Hello Diren,
Spatialite is absolutely available for Windows. Unlike other software, it does not need to be installed per-se, it is available online as a pre-compiled binary. A binary is an ordinary .exe file, which you can open and use without installation. These can be found at:
http://www.gaia-gis.it/spatialite-2.3.1/binaries.html. Since you are a novice, you would probably want spatialite-gui and spatialite-gis. The former contains the entire spatialite library with a light graphical user interface, while the latter is a minimal GIS based on spatialite. Within these downloads you would want to open the .exe files to get started.
Hope that helps.