Broadly I agree with the 8-12 range mentioned above.
But when starting out, it is probably better to aim at a slightly lighter weight and the 12-15 range, on a couple of grounds.
* it is better to find what is a challenging weight for you by lifting light, and then increasing it slightly next time, than it is to risk using a weight too heavy for you.
* for reasons of both safety and effectiveness, it is important to use good form for each exercise. And it is easier to learn good form by starting with a lighter weight, than a heavier one.
Over time, you will almost certainly want to go heavier, but where you are starting sounds pretty good for right now.