Yup, make sure you sit up tall, shoulders back, pull your belly button into your spine so that you really support your lower back.
Make sure you pull the handles into the very lower part of your belly, push off through your heels but don't lock your knees out.
Bring the handles back forward so that they're only about 15cm away from the screen/front of the machine (if that makes sense??). This will slow your strokes per minute speed down, however it will increase your distance rowed massively.
I think that's pretty much it
Have fun! I love the rower!!