Take a weekend and do something basic in it. Don't "learn" it, just use it to make something.
These days, it seems a blogging engine is the new hello word due to it's ubiquity. Try that. What about a simple chat client? AIR would be good for that.
The key is, use the tool to build something you don't have to think about too much, and you'll end up learning all the things you'll need to. (Including where to get help)
This is exactly what I came in here to say; write a simple blogging app. For learning languages, I like to do some problems from projecteuler.net till it starts sinking in.
These days, it seems a blogging engine is the new hello word due to it's ubiquity. Try that. What about a simple chat client? AIR would be good for that.
The key is, use the tool to build something you don't have to think about too much, and you'll end up learning all the things you'll need to. (Including where to get help)