To get started, have a look at how other games work. Tinker with them and see what small changes you can make. The best way to learn is to break things. Once you understand the basics, start with small projects like self-playing stories with no user interaction.
And unless you're good at editing sprites, familiarize yourself with the default resources. It's a pain to almost finish a project then hit a brick wall because you're missing one simple animation.
Also, check out these tutorials created by BobbyGecko. He created a small game that demonstrates flags and other useful features of the editor.
viewtopic.php?f=35&t=3471&start=100#p242030Setting it up may be tricky since you're not familiar with the engine, so follow these steps.
- Make a fresh copy of the editor.
- Download the tutorial from the second link in the post linked above.
- Extract and open the tuto.rar file and copy them into the editor folder so they overwrite the existing folders.
- Download the updated level file from his post here: viewtopic.php?f=35&t=3471&start=120#p245359
- Extract the turo.lvl file into the /levels folder.
- Launch the game through either the .exe, .swf, or .html
Also, there is official documentation in HTML format found the the /help folder.
Have fun!