Not that I'm a knifemaker or anything but it seems that spring steel is not an ideal steel to make a first knife out of. First of all, you don't know exactly what steel it is so how are you going to heat treat it? Second, you're going to need a way to temper it before you work with it or else it'll be a beast to work with. Trust me on this...I made the mistake of making my first knife from spring steel and even with a tempering cycle it was still VERY hard to work with.