I hope his post didn't throw you off. if you don't know all the jargon or the theory of electronics, it's easy to get lost.

like he said, ohms are resistance in the wires. If you have more resistance, less power will be drawn. The lower the ohm rating, the more effecient your amp will run. However, if you overwork your amp, it can easily overheat. But that shouldn't be a problem for you.