Well done on the purchase, as its probably one of the better Flash programs out there.
As for Actionscript, it depends how quickly you learn. You'll be surprised on the latest version, how much you can do without Actionscript anyway.
When typing code, there is a help, and also, an Autoscript, which basically helps you along by telling you what you need to make one patch of code work.
After a few years, you'll probably know quite alot of it.
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