Thank you, I'll try to get it. The Fink book seems not too complicated to me, but too trivial - any teacher could tell you these things in a few minutes. But then, i may be TOTALLY wrong with that impression.
Berrt
I would indeed say that you are TOTALLY wrong with that impression.

In fact, the material Fink presents in his book is very complex and very useful. Unfortunately, he does go over certain things in a rather cursory fashion. For example, he points out that the exercises should be mastered in series, but it will not be clear to most readers that mastering the first exercise alone will take months. Yes, I am talking about just simply standing correctly. There is so much hidden in this one "exercise". In this respect, you may want to check out the book "What every pianist needs to know about the body" from Thomas Mark. There is an accompanying video that is very helpful. This will prime you for Fink. Working through Fink with a knowledgeable teacher will take a couple of years. Finally, you can get the videos from the Taubman institute. They are expensive but very good, and they cover pretty much anything you'd ever wanted to know about good technique.
If you are an adult beginner, I would strongly recommend making proper technique one of the major aspects of your lessons. You will find that Fuer Elise is all of a sudden so much more difficult, because you will have to learn technique, not just pounding keys. It will also be a lot more rewarding and productive in the long run. Also, at this age, we all have acquired a lot of bad habits and even injuries. Believe me, the piano will bring out every one of them. Start working on them now. Keep in mind that you will need a very, very good teacher to guide you through this. Books and videos are good, but they can only be start.