No matter what you toss into a garden it's very hard to go wrong. I find the nicest gardens are directly related to how much the owner puts into it.
I don't think a 'class' in garden design is enough...you need to have some passion, real honest to goodness heart. And only then will the soul emerge through your efforts.
So, the moral of this story is to simply... go for it! Plant what you love...in whatever you like...be it an old baby stroller or an old clothes dresser. Just do it ! Or you can always call me...
Results do take time, usually years, but it's always worth it in the end. And how successfull you have been is directly related to how often you find yourself strolling your own gardens.
This pic is from a garden bed in my backyard.