Since you're still just beginning to learn Paint.NET, I'd suggest start by doing something simple. Add a border, for example. Or add a sun in the background. Start with small steps, then as you learn you'll find yourself being more and more ambitious.
Looks pretty darn good as it is, though. You are an excellent tutorial follower
Thanks.
But starting with small-steps will be difficult for me, I won't lie.
I'm one of those people who kind-a likes to jump the gun, so to speak. Especially with graphic design because I've always been so in love with it.
I'll mess around with this tut some more and see what I come up with.
EDIT: K, so...
I messed around with about 7 other plugins I got off of here and made the picture look amazing sweet, in my opinion. However, I wasn't paying attention to what I was saving it as and put "1.1" in the name, and now I can't open it. xD