I don't know exactly what kind of difficulty you are having...but one problem I had when starting out is that I tried to be too perfect. That sounds kind of silly, but I spent way too much time trying to get the hinge exactly lined up, and centered. What I found out is that it didn't make too much difference if it was lined up or not. If it is more or less near the top, and no part of the hinge shows beyond the 4 edges of the stamp, you are good to go. If the stamp is reasonably centered in it's space that is close enough. If the stamp is not correctly placed vertically (angled a bit to the right or left) you can bend the stamp to a straight position...and a bit of pressure will set the bent part of the hinge in a slightly straighter position...and the weight of the pages will hold it while it dries.
Now you should have a reasonably centered top to bottom/right to left/& almost exactly straight stamp. Like anything else, after you have done a couple of hundred stamps (that's not all that many really) you should have a good grip on centering the stamp in the space & keeping the tops of all your stamps even.
That's assuming that is what you were having trouble with in the first place...
