Rendering time depends on your quality, resolution, etc, settings.
Heres a simple intro:
Use the transform editor to edit a fractal. Theres a button on the toolbar to open it.
This should open a window with some triangles, a preview window, and a tabbed area. In the tab area, select Variations and a list of names and values will pop up. These control the shape and overall outcome of the fractal, and are the sole basis of it. Try toying with these to get different shapes etc.
Also, remember that you can add, move, and manipulate triangles.
Theres tons of tools in Apo and you'll figure them