In the Pixelhobby starter set category you will find a wide variety of sets with which you can get started right away. There is more than one template in all sets, so you can decide for yourself what you feel like doing.
However, a brief explanation first
Pixel hobby classic (mini):
These are the little stones. They are only 2 x 2 mm and always fit on a pin on each plate. With these stones you can pixel everything.
Pixel Hobby XL (Midi):
These are the big stones. They are 4 x 4 mm in size and each fit 2 x 2 pins. The great thing about them is that you can do them over and over again, since there is a small selection of colors you can always find the right color. Also great for on the go.