There are tons of sites online that provide interactive flash content. However, seeing is far from doing. Learning the basics from the ground up is the way to learn if you want to be an advanced Flash developer. Try a google search on "learning Flash" or "flash developement" to see what others have accomplished with the application. Check out sites like flashkit.com........... kirupa.com...........bit-101.com ....void.andre-michelle.com/......levitated.net.... or .... krazydad.com/bestiary/ .... for some interesting examples. Beyond that, creating your own designs is the best way to learn. Hands on experience is hard to beat. If you get stuck on a paritucular method or have specific problems, forums like this one are also numerous.
hope it helps
A mind once stretched by a new idea never regains its original dimensions.
- Oliver Wendell Holmes