Ah, so you're interested in TNT?
I can help with starting out. But you should really just go through at least the Tron tutorial and the Tile Map tutorial.
In TNT you have to import graphics and display them as sprites, or paint them on the canvas... It's less convenient than SC in some ways, but it has the tile maps and I think it's more powerful overall because of it's speed. I love the tile maps, have I mentioned how much I like built-in tile maps?