There is a lot going on here ...

If you are trying to learn lua, I enjoyed Pauls (DBM author) book a lot some time ago ...

http://www.amazon.com/Paul-Emmerich/...ont_pop_book_1

... its a good introduction to lua basics and specifically libraries. The ACE wiki has a lots free tutorials for getting started with Lua libraries stuff that lands you in the same place that Paul's book does. (both relatively in the same era it seems as well). There are some good WeakAura/Broker library example / tutorials l works also that can get you started mashing some stuff up and get some real gratification as well.

You could start out with hacking on a OUF and write an aura or similar plugin ...

http://www.wowinterface.com/downloads/cat128.html

... and hack away at those. A lot of them are pretty simple and do a lot of what the mash-up tutorials do, but some of the programming is really gross.

If you are just trying to code a layout for OUF, they have some pretty well documented layouts and their forum has a lot of decent people it seems. But the layouts are very very specific really. Not the best entry into programming.