It does not matter if you have practiced woodworking for many years or if you are still a novice, you can always have use for some easy shed design plans. It will be much easier for you to finish your projects if you follow simple shed plans and I probably don't have to mention that it's important to check the accuracy of the plan before you start working.
It is up to you where you would like to pick your wooden shed design plans. You can find hundreds of them on the net but not all of them are accurate. It's more likely that you will find a good plan for your new project if you consult a book about the woodworking craft. A subscription for a woodworking magazine might help you a lot as well. Internet is a great source for many things and it's a great place when you would like to read articles and learn much about a certain topic, such as woodworking, but it's not the perfect place when you want to find easy woodworking plans.