As far a grain layout and stuff, don't worry about it. The kit will tell you all of that. Build a few kits and you will learn more. Build a couple gliders too and you will see different techniques. The more you build the better you will get. Then start scratch. Usually the plans will lay out grain directions for you. As you get more experience, you will know what mods to make to lighten or strengthen things. It just takes time. If you have some one close, have them check it out every once in a while and give advice. Visit as many friends shops and look closely at what they build and ask questions. Look at kits at the field and get ideas of things there. You can learn a lot from looking at others work. Sometimes what to do, sometimes what not to do. Find out what works and what doesn't. No substitute for experience.