I would just look at a bunch of different plans to get a general idea of different techniques then either pick one that best suited my needs or come up with my own design based on available materials/tools, budget, difficulty ect.

For example, I have a bunch of free round wood poles I could use to build a shed but the difficulty and my lack of experience might not be worth it vs building with lumber from the hardware store that I'm already familiar with even though the cost would be more for materials.