Rexor, I'm glad you are observing and thinking about what you are doing.
Some people simply can't achieve safe competency in the frame of a quick class. I was one of them. If you have reservations about your ability to perform ANY skill (and especially mask skills!), request more pool time. You may have to pay for it. It will be worth it. Masks DO flood -- It's really pretty unavoidable -- and you HAVE to be able to remain calm and methodical while coping with it. And remember, the water in the Sound is cold, which is quite different from the pool. You should be cheerfully unperturbed by mask flood and clear, or mask remove and replace, before you go on to test the skill in open water.
One tip -- Classes make you practice mask clearing while sitting or kneeling on the bottom, in an upright position. In that position, the bottom of your mask IS the lowest point in the mask, so there is NO need to tip the head back to achieve an adequate clear. If you do, you are encouraging any water in your mask or nose to run down the back of your throat and choke you.
When you are in a horizontal position, as you mostly would be while diving, and are looking down, the lenses are the lowest point, so you HAVE to tip your head back to get the mask fully cleared. The difference between the two is, in my experience, not explained well (if at all) in pool sessions.
Should you complete your class and still feel inadequately trained or unsafe, PM me -- Either my husband (a PADI DM) or I (just a diver, but I like mentoring) would be happy to meet up with you for some practice time. We have a pool, too.