Maya ball bounce and roll

At this point I'm trying to get to grips with Maya, and at the start even the simplest seeming task, is tricky when you are unfamiliar with the software. I was pleased with what I did here, but looking back I can do much better already. I was trying to make it bounce in different directions, so it's not natural, its just jumping where it likes. The speed is also wrong, it goes from very fast bouncing to very slow rolling, and because there's nothing that it has hit, like a different textured floor, it doesn't make sense. However! I was trying and for what I knew, I made a good effort. I would like to do some more little tests with this rig, just to solidify my understanding, and make sure I can do a simple ball well.