Offset questions -.-;;

JZNx

So I thought I had good concept of offsets but now I am confusing myself -.-;;
Now that I am really close to buying some new wheels, I wanna make sure I know what I am talking about, so bare with me guys =) and thanks for reading =)

The way I had it in my mind, the higher the offset the wheel will be more inward to the center of the car. The lower the offset the will wheel will be more outward from the center of the car.

So the way I see it, if you take the lowest offset it would be very difficult to see the wheels because wheel will be way inward to the center of the car. And vice versa, if the offset is really high then the wheel will be hella sticking out because it would be outward from the center.

Am I good so far? =( ?!?!?!

So now let me apply this in actual application in life =)
So if i buy a set of square setup such as 19x10.5, and want to make it less aggressive, it would be best to go with the highest offset possible?
And vice versa again, if I buy a square setup 18x7 and want to make it look more aggressive I want to get a lowest offset possible?

Am I on the right track or am I smokin cRak?
lol... thanks for reading guys =)