Exactly the machine I use Jason.
For a beginner, the 230 rpm with a 15"/400mm board isn't as daunting as it first may seem, and should not present a problem.
The slightly larger 17"/450mm is however, little more risky in the hands of an unskilled operator.
Although they both run @ 230rpm, the perimeter speed of the pad on the larger machine is quite a bit greater and could lead to scorching on polypropylene and greater risk of pile damage on wool. That's why I would always advise a newbie to 175rpm for a larger machine.
You'll probably find that your rotary will be the most versatile "tool in your box" and the best value for money you've ever had.
As for pads on carpet tiles, for pure agitation I would play safe at this stage and go for the gentlest white (3M colour code) Can also be used for Encap. For other carpets you might even try 3M carpet skimming pads. They almost look like a piece of rag but are terrific for agitation often out performing a brush
For bonnet pads, I prefer to stick with synthetic Turan fibre 'cos they are effective and easy to launder. But the choice is considerable and I'm sure others will pass on their preferences too.
Safe and happy cleaning
The Ken