No it is not correct. They are very young plants that need to be grown on for some years, also defoliating must only be done on strong healthy plants,
I doubt that you will reduce the leaf size anyway. It is not something that I recommend especially for beginners. It is a very stressful thing to do and should only be done when it will benefit the design.
As I said previously, defoliation has to be done if needed and only then. These trees are young and still growing and not ready for styling. The leaves do not appear to be too big for the size of the tree. I also never do a complete defoliation, I only remove the larger leaves, and only the ones that are over the top of others so as to allow light into the lower branches. I think you should concentrate on growing the tree and keeping it healthy for at least another year or so during which time you can decide what you want to do, what style you want, and what pot you will get for it. There is no need to rush.