I cut vinyl on mine all the time from words for labelling to tracing free clip art ie I did dinosaur footprints for my son's bedroom wall.
There are a load of video tutorials on youtube to help you learn. I've had my Silhouette 6 months. Love it.
I am better at tracing stuff than sketching within silhouette, ie I can't use inkscape as it's too complicated but I can find free "colouring page" images and save and trace those. Tracing is explained on youtube.
i've got a Silhouette and I love it, I just made a new baby poster and framed it using vinyl wording. Very similar to this it was perfect for doing it. You can get a much more intricate cut on vinyl than with paper/card.