Ahmet,
You need a cpl to reduce the reflections on the glass, otherwise nicely seen.
https://photographylife.com/how-to-use-a-polarizer
Interesting shot Ahmet. John makes a good point regarding polarizing filters; this type of image could certainly use a bit of reduction in the reflection as it really overwhelms the subject. Just don't think reflections have to be removed 100% of the time as they can be an interesting compositional element if done well.
I liked it the way it is; you meant it that way, i suppose