I am still not giving up, and I put all my free time and energy resources to learn something new about Ruby on Rails. I have learned what are Models, Controllers and Views for. I knew it, from the theoretical side much earlier, but while reading the book (which by the way was written with a lot of thought) I am starting to see much broader scope of this whole Rails framework.
I have also learned working with databases. However I still do not know which one should I use? Should it be SQLite 3 due to its simplicity or maybe MySQL because of its better performance. If you have some thoughts on this issue I will be glad to to read them.