The landing is basically a controlled descend to the runway. As lower the ROD is, the smoother the landing will result. The problem you have, is that you don't know when you need to "pull the yoke" and how much you need to pull it. This may result in a bumpy landing or the aircraft climbing up again. We don't want either one of it. Furthermore we want that nose aligned with the runways center line. Wufff, how to bring that all together?
Let me tell you one of the aviators secretes
Once you are at about 50ft over the runway, start slowly to reduce your power. At the same time YOUR EYES WILL GO TO
THE RUNWAY. And there they will stay! By looking down the runway, you will automatically "see" your ROD. And even better: By doing so, you just need to give some "foot" on the side you want to have your nose and you will be perfectly aligned. Try it and I am sure, a few more tries and you are doing perfect. It's not a question of "how many", it's a question of realizing how it works. Remember: YOU LOOK TO
THE RUNWAYS END, but please the one in front of you
The biggest mistake, that happens normally is that people are looking down to the runway, into the spot they want to land. This way it won't work. Remember, if you walk in the street and somebody comes towards you: If both look at eachother, you hardly can cross, both are all the time going to the wrong side. You need to look where you want to go. On the landing you want to go down this runway, so you look to it's end.
Now I wish you lots of success in training, take care and