Grids seem to have run their course these days especially as the buzzword now is responsive design so google responsive design and you will find some better methods of approaching site layout.
However whatever method you use you will still need an understanding of the underlying fundamentals so if you are a beginner then take time to learn the basics of html and css first otherwise you will be swimming uphill all the way.
A lot of beginners use grids because they think it is the easy way out but soon find that they are stuck in a grid that they can't get out of. In the end grids are just css and html that you should be able to build for yourself. There are good ideas and techniques within a lot of grid structures so study them but don't be bound by them.