Learning generally boils down to "Repetition or the avoidance of pain", some people learn by doing, some by watching and some just have to pee on the electric fence.
Whether you think that you can, or that you can't, you are usually right. Henry Ford
Take a peek at the plans if your the type that likes detailed plans...if not, check out the calculators, read up on as many builds as you can design your own and get to work! Take lots and lots of pictures!
We really need to know a little more about what you intend to build before we can offer much advice. A rough sketch with dimensions really help us to understand your vision.