Every car is different, as each one has its one gear ratios between the transmission and rear-end. Also, the amount of torque an engine has is a factor also.
You'll get used to the car soon enough, and you'll be able to tell if the revs are too low for the gear you're in. The most important thing is to keep from riding the clutch, which will wear it out too fast. At the same time, you don't want to let the pedal out too fast, or you'll stall. Traction control can be your friend while you're learning to drive a stick. Good luck!!
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