One of the problems with silverpoint is that there is no going back. You go right in with the silver stylus, and there is no pre-drawing nor erasing. What you put down stays there, mistakes and all. Initially, the drawing looks very light, like this one. However, over time the silver tarnishes. As it darkens and develops a beautiful patina, the contrast of the drawing increases. I wish there were a way to speed it along! One tip I can give you is that although you cannot erase, you can cover mistakes by painting on more Silverpoint Ground, waiting for it to dry, and then drawing over it. Not that I would do that. Ever. (I can't even type that with a straight face.) But in this case, I did not correct anything and it was sketched start to finish in one short sitting. Here is an image of just the sketch:
Here's a little video that's on the Golden website, which explains more about using Silverpoint Ground:
Try it. You'll like it!