Oma,
Great job on the snowman ! I think this tut does a great job of demonstrating the use and effect of layering - are useful task for noob and veteran alike. I also believe the use of the Magic Wand, Lasso Tool, Gradients, Blurs, and Shadowing effects are very beneficial for anyone trying to learn paint.NET. Despite my low post-count, I have been a paint.NET user for a long time and attribute much of my knowledge and success to learning from the tutorials in this forum.
I think a newbie would be well-advised to try tuts such as this and gleen the knowledge from the user base to further one's skills.
As usual, great job !