That is so sad, Maria! It is that way in many countries. It used to be illegal in many states in America as well, but citizens fought for parental rights to homeschool, and are continually improving the law in favor of parental rights. Democracy is good for something!
Preschool and Kindergarten in a homeschool setting is really nothing parents should worry over too much. I know they always do anyway...I sure did. Cut, paste, learn about numbers by counting things, read to them, play good music, go on nature walks, visit museums with them- you know, the fun stuff!
Here are some books that you should read:
Catholic Homeschooling by Mary Kay Clark
Designing your Own Classical Curriculum by Laura Berquist
The Writing Road to Reading by Romalda Spalding (No matter what curriculum you use, it should be based on Phonics. Even if the Spalding method is not used, this book familiarizes the parent with the subject.)
The Three R's by Ruth Beechick (Three little booklets that explain a natural method of teaching K-3 grades- takes the mystery out of the dynamics of learning)
There is also another title I can't recall, but it is something like Montessori in the Home. It explains how to bring the benefits of Montessori education into your own home (can be used even if you do not completely agree with Montessori's theories.)
Those are good places to start.
Here is a list of curriculum providers to start with. You have very flexible options with most. You can either purchase books or lesson plans, or you can choose to enroll them in the correspondence programs.
Our Lady of Victory www.olvs.org
Kolbe Academy www.kolbe.org
Mother of Divine Grace www.motherofdivinegrace.org
Catholic Heritage Curricula www.chcweb.com
Those are all Catholic. Some are conservative, others traditional. There are many other places to obtain curricula, but that will get you off to a good start.