Aslanov, the violin is nothing like a piano. Take it from someone who's been there. I suggest that you discuss your question on the site I provided, as well as
www.violinmasterclass.com The latter also has a great number of tutorials.
In the very least, if you go that route, find yourself a trained violinist to check out violins for you - somebody who knows what they are doing and what a beginner needs for playability, balance, and the rest. Don't forget the bow.
On violin, you
are the instrument. The way you stand and balance affects its resonance. The thing is hanging from your chin, balanced on your hand (depending on which method you use), stuck out in mid air at a weird angle while you try to balance a bow in the other hand. If you get this wrong, everything becomes very hard. You can also injure yourself, especially in the neck area.
Best of luck,
KP