I don't read Greek, but those appear to be ceramic knives, which never need sharpening, but they are a bit fragile. If you drop one on a bare floor, such as tile, it could easily break. I have a set of those, which I usually use for cutting up lettuce and other vegetables, because they won't cause the produce to turn black. They are deceptively sharp, which causes a lot of people to handle them like toys until they end up cutting themselves. I think they would be an inexpensive starter set for you, then as you gain more experience and confidence you can start buying more expensive knives.