Agree with the pressure, let the razor do the work. And the blades your using may not agree with you. Here's the rules I followed when I started using a DE

watch your angle
No pressure, let the razor do the work
It's called wet shaving for a reason, make sure your face stay's wet and is lathered up, rinse your face once you complete your first pass, leave it wet and re-lather for the second and so on