Ball flight will be a result of whether you hit the ball pure or toe it, heel it, thin it, or fat it, or arrive with an open or closed clubface.
But if you DO develop this technique appropriately you will achieve low point after the ball, you will likely eliminate overthetop direction simply by moving your HANDS DIRECTLY DOWN TO AND THEN ALONG the target line.
Nets are fine except you get no feedback other than ball contact. I much prefer whiffle balls while learning, and then range work.
Ball flight becomes something you can control with skill - low, high, or working the ball. But that can wait. Just achieve good impact without the pulls and your confidence will soar.